/* =========================================================
   MACHPROOF — Pure HTML/CSS/JS Static Site
   Premium industrial design system (Theme C · Steel Navy × Amber)
   结构色：深钢蓝（替换近黑，降低压迫感、提升可信度）
   行动色：暖琥珀（CTA / 强调）
   底色：冷调浅灰白（通透、不刺眼）
========================================================= */

:root {
  /* ===== 方案 C：深钢蓝 × 暖琥珀（2026-09 调整） ===== */
  /* 深色区块：用钢蓝代替炭黑，沉稳但不压抑 */
  --c-dark: #10344e;          /* deep steel navy — dark sections */
  --c-dark2: #16425f;         /* alternate dark bg */
  --c-card: #17394f;          /* media placeholder bg */

  /* 文字与强调 */
  --c-ink: #16242f;           /* headings on light（蓝灰墨色，比纯黑柔和） */
  --c-accent: #ff9f2e;        /* signature amber（保留暖色行动色） */
  --c-accent-h: #ffb757;
  --c-accent-ink: #2a1a04;    /* text placed on amber */
  --c-verify: #2bb673;        /* verified green — 徽章点缀 */

  /* 浅色底 */
  --c-white: #ffffff;
  --c-bg2: #f2f6f9;           /* cool light section */
  --c-cardbg: #fafcfe;
  --c-navy-soft: rgba(16, 52, 78, .06);
  --c-amber-soft: rgba(255, 159, 46, .12);

  --c-line: #e1e8ee;          /* light separators */
  --c-line2: #e8eef3;
  --c-line-d: rgba(255, 255, 255, .18);  /* dark separators */
  --c-line-d2: rgba(255, 255, 255, .32); /* dark outline */

  --c-t1: #54636f;            /* paragraph gray */
  --c-t2: #8194a3;            /* h2 dim line */
  --c-t3: #9fb2c1;            /* dark-section muted */
  --c-lbl: #8fa4b5;           /* dark-section label */
  --c-dim: #6f8494;
  --c-hi: #c3d3de;            /* dark-section paragraph */

  /* 辅助深色（顶部条 / 下拉 / 悬浮 / 占位底） —— 换主题时一起变 */
  --c-dark3: #0d2b41;         /* top-strip · mobile nav */
  --c-dark4: #12324a;         /* language dropdown */
  --c-dark-h: #1a4463;        /* .btn-dark hover */
  --c-ph1: #1c4a6b;           /* media placeholder gradient (outer) */
  --c-ph2: #123650;           /* media placeholder gradient (inner) */
  --c-vs1: #1d4c6d;           /* video slot gradient (outer) */
  --c-vs2: #12344d;           /* video slot gradient (inner) */
  --c-vs-bg: #13384f;         /* video slot base */
  --c-header-bg: rgba(13, 43, 65, .96);  /* sticky header */

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
          'Helvetica Neue', 'Noto Sans SC', 'Microsoft YaHei', Arial, sans-serif;
  --font-head: 'Manrope', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
          Roboto, 'Noto Sans SC', 'Microsoft YaHei', Arial, sans-serif;

  --container: 1180px;
  --gutter: 24px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* subtle navy + amber glow + depth for dark areas */
.bg-dark { background:
  radial-gradient(1200px 540px at 86% -12%, rgba(255,159,46,.11), transparent 55%),
  radial-gradient(900px 520px at 8% 110%, rgba(43,182,115,.06), transparent 60%),
  linear-gradient(180deg, var(--c-dark2) 0%, var(--c-dark) 48%),
  var(--c-dark); }

/* =========================================================
   RESET / BASE
========================================================= */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--c-ink);
  background: var(--c-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, video { max-width: 100%; display: block; }

a { color: inherit; }

::selection { background: var(--c-accent); color: var(--c-dark); }

h1, h2, h3, h4 { margin: 0; font-weight: 800; letter-spacing: -0.032em; font-family: var(--font-head); }

p { margin: 0; }

ul { margin: 0; padding: 0; list-style: none; }

button { font-family: inherit; }

:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }

/* scrollbar subtle */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #c5d0d9; }
::-webkit-scrollbar-track { background: #eef3f7; }

/* =========================================================
   LAYOUT UTILITIES
========================================================= */
.container { width: min(var(--container), calc(100% - 2 * var(--gutter))); margin: 0 auto; }
.container-narrow { width: min(880px, calc(100% - 2 * var(--gutter))); margin: 0 auto; }

.section { padding: 108px 0; }
.section-tight { padding: 84px 0; }

/* section backgrounds + faint engineering grid */
.bg-dark { position: relative; background: var(--c-dark); color: var(--c-white); overflow: hidden; }
.bg-dark::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 72px 72px;
}
.bg-white-grid, .bg-gray-grid { position: relative; overflow: hidden; }
.bg-white-grid::after, .bg-gray-grid::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(16,52,78,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16,52,78,.05) 1px, transparent 1px);
  background-size: 72px 72px;
}
.bg-white-grid > *, .bg-gray-grid > *, .bg-dark > * { position: relative; z-index: 1; }

.bg-gray { background: var(--c-bg2); }
.bg-white { background: var(--c-white); }

/* =========================================================
   TOP TRUST STRIP
========================================================= */
.top-strip {
  background: var(--c-dark3); color: var(--c-lbl);
  font-size: 9.5px; letter-spacing: .05em;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.top-strip .container { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 30px; }
.top-strip .ts-left { display: flex; align-items: center; gap: 10px; color: var(--c-t3); font-weight: 600; }
.top-strip .ts-left .dot { width: 6px; height: 6px; background: var(--c-accent); }
.top-strip .ts-right { display: flex; align-items: center; gap: 18px; }
.top-strip a { color: #c3d3de; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
.top-strip a:hover { color: var(--c-accent); }
.top-strip svg { width: 12px; height: 12px; fill: currentColor; }
.top-strip .sep { color: rgba(255,255,255,.22); }

/* =========================================================
   HEADER / NAV
========================================================= */
.site-header {
  position: sticky; top: 0; z-index: 90;
  background: var(--c-header-bg);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(255,255,255,.12);
  color: var(--c-white);
}
.header-inner { display: flex; align-items: center; gap: 28px; height: 74px; }

.brand {
  font-family: var(--font-head);
  font-weight: 800; font-size: 17px; letter-spacing: .14em;
  text-decoration: none; color: var(--c-white); white-space: nowrap;
  display: flex; align-items: center; gap: 10px;
}
.brand .brand-mark {
  width: 8px; height: 8px; background: var(--c-accent); display: inline-block;
  box-shadow: 0 0 0 1px rgba(255,159,46,.45);
}

.main-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.main-nav a {
  color: #cad8e2; text-decoration: none;
  font-size: 10.5px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase;
  padding: 9px 11px; border-radius: 2px; transition: color .18s, background .18s;
  white-space: nowrap;
}
.main-nav a:hover { color: var(--c-white); background: rgba(255,255,255,.05); }
.main-nav a.is-active { color: var(--c-accent); }

.nav-wa {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--c-line-d2); color: var(--c-white) !important;
  padding: 9px 14px !important; margin-left: 10px;
}
.nav-wa:hover { border-color: var(--c-accent); color: var(--c-accent) !important; }
.nav-wa svg { width: 15px; height: 15px; fill: currentColor; }

.header-tools { display: flex; align-items: center; gap: 10px; }

/* language dropdown */
.lang-wrap { position: relative; }
.lang-btn {
  display: inline-flex; align-items: center; gap: 7px;
  background: transparent; color: var(--c-white);
  border: 1px solid var(--c-line-d2); border-radius: 2px;
  font-size: 11px; font-weight: 700; letter-spacing: .08em;
  padding: 8px 12px; cursor: pointer; text-transform: uppercase;
}
.lang-btn:hover { border-color: var(--c-accent); color: var(--c-accent); }
.lang-btn .globe { width: 13px; height: 13px; }
.lang-menu {
  position: absolute; top: calc(100% + 8px); right: 0; min-width: 168px;
  background: var(--c-dark4); border: 1px solid var(--c-line-d2);
  padding: 6px; display: none; z-index: 99;
}
.lang-menu.open { display: block; }
.lang-menu button {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  width: 100%; text-align: left; background: none; border: none; color: #cad8e2;
  font-size: 12.5px; padding: 8px 10px; cursor: pointer;
}
.lang-menu button:hover { background: rgba(255,255,255,.06); color: var(--c-white); }
.lang-menu button .code { font-size: 10px; letter-spacing: .1em; color: var(--c-dim); }
.lang-menu button.is-current { color: var(--c-accent); }
.lang-menu button.is-current .code { color: var(--c-accent); }

/* hamburger */
.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 42px; height: 42px; background: transparent; border: 1px solid var(--c-line-d2);
  cursor: pointer; align-items: center;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--c-white); transition: .25s var(--ease); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================================
   BUTTONS
========================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 20px;
  min-height: 48px; padding: 0 22px;
  font-size: 10px; font-weight: 800; letter-spacing: .11em; text-transform: uppercase;
  text-decoration: none; border: 1px solid transparent; cursor: pointer;
  transition: background .18s, color .18s, border-color .18s;
}
.btn .arrow { transition: transform .18s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }
.btn-yellow { background: var(--c-accent); color: var(--c-accent-ink); }
.btn-yellow:hover { background: var(--c-accent-h); }
.btn-outline-light { border-color: var(--c-line-d2); color: var(--c-white); background: transparent; }
.btn-outline-light:hover { border-color: var(--c-accent); color: var(--c-accent); }
.btn-outline-dark { border-color: var(--c-line); color: var(--c-ink); background: transparent; }
.btn-outline-dark:hover { border-color: var(--c-dark); }
.btn-dark { background: var(--c-dark); color: var(--c-white); }
.btn-dark:hover { background: var(--c-dark-h); }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: 9px; gap: 12px; }
.btn-block { width: 100%; }

/* text arrow link */
.link-arrow {
  display: inline-flex; align-items: center; gap: 14px;
  color: var(--c-ink); font-size: 10px; font-weight: 800;
  letter-spacing: .11em; text-transform: uppercase; text-decoration: none;
}
.link-arrow .arrow { font-size: 15px; transition: transform .18s var(--ease); }
.link-arrow:hover .arrow { transform: translateX(5px); }
.link-arrow.on-dark { color: var(--c-white); }
.link-arrow.on-dark:hover { color: var(--c-accent); }

/* =========================================================
   SECTION HEAD
========================================================= */
.sec-head {
  display: grid; grid-template-columns: .3fr 1fr; gap: 80px;
  align-items: end; padding-bottom: 50px; margin-bottom: 46px;
  border-bottom: 1px solid var(--c-line);
}
.on-dark .sec-head { border-bottom-color: rgba(255,255,255,.15); }

.sec-index {
  font-size: 9px; font-weight: 800; letter-spacing: .16em;
  color: var(--c-t1); text-transform: uppercase; padding-top: 4px;
}
.on-dark .sec-index { color: var(--c-lbl); }

.sec-title {
  font-size: clamp(40px, 5vw, 60px); line-height: .98; letter-spacing: -.05em;
}
.sec-title .dim { color: var(--c-t2); font-weight: 700; }
.sec-title.on-dark-title { color: var(--c-white); }
.sec-lead { max-width: 560px; margin-top: 24px; color: var(--c-t1); font-size: 15px; line-height: 1.8; }
.on-dark .sec-lead { color: var(--c-t3); }

.sec-head .sec-title-wrap { max-width: 640px; }

/* yellow tag */
.yellow-tag {
  display: inline-flex; align-items: center; gap: 9px;
  color: var(--c-accent); font-size: 10px; font-weight: 800;
  letter-spacing: .15em; margin-bottom: 22px;
}
.yellow-tag::before { content: ""; width: 7px; height: 7px; background: var(--c-accent); }

/* =========================================================
   HOME HERO
========================================================= */
.hero {
  min-height: 680px; display: flex; align-items: center;
  padding: 86px 0 54px; background: var(--c-dark); color: var(--c-white);
}
.hero .topline {
  display: flex; justify-content: space-between; gap: 24px;
  padding-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,.15);
  color: var(--c-lbl); font-size: 9px; font-weight: 800; letter-spacing: .16em;
}
.hero-layout { display: grid; grid-template-columns: 1fr .92fr; gap: 70px; align-items: center; padding: 62px 0; }
.hero h1 {
  font-size: clamp(50px, 6.2vw, 84px); line-height: .96; letter-spacing: -.06em;
  font-weight: 780; margin: 0;
}
.hero h1 em { color: var(--c-accent); font-style: normal; }
.hero-desc { max-width: 560px; margin-top: 30px; color: var(--c-t3); font-size: 16px; line-height: 1.75; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 38px; }
.hero-bottom { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,.15); }
.hero-bottom span { padding: 17px 0 0; color: var(--c-dim); font-size: 8px; font-weight: 800; letter-spacing: .14em; }
.hero-bottom span + span { border-left: 1px solid rgba(255,255,255,.1); padding-left: 20px; }

/* =========================================================
   INNER PAGE SUB-HERO
========================================================= */
.subhero { padding: 74px 0 64px; background: var(--c-dark); color: var(--c-white); }
.subhero .crumb {
  display: flex; gap: 18px; align-items: center;
  color: var(--c-lbl); font-size: 9px; font-weight: 800; letter-spacing: .18em;
  margin-bottom: 26px;
}
.subhero .crumb b { color: var(--c-accent); font-weight: 800; }
.subhero h1 {
  font-size: clamp(44px, 6vw, 78px); line-height: .98; letter-spacing: -.055em;
  max-width: 900px;
}
.subhero h1 em { color: var(--c-accent); font-style: normal; }
.subhero p.lead { max-width: 640px; margin-top: 26px; color: var(--c-t3); font-size: 16px; line-height: 1.8; }

/* =========================================================
   MEDIA / PLACEHOLDER SYSTEM
========================================================= */
.media {
  position: relative; overflow: hidden;
  background:
    linear-gradient(rgba(255,159,46,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,159,46,.06) 1px, transparent 1px),
    radial-gradient(circle at 50% 45%, var(--c-ph1) 0%, var(--c-ph2) 75%);
  background-size: 40px 40px, 40px 40px, 100% 100%;
  background-color: var(--c-card);
}
.media img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: 0; transition: opacity .5s var(--ease);
}
.media img.loaded { opacity: 1; }
.media .mono {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 12px; color: rgba(255,255,255,.5);
}
.media .mono b { font-size: 30px; font-weight: 800; letter-spacing: -.05em; color: rgba(255,159,46,.78); }
.media .mono small { font-size: 8px; letter-spacing: .28em; font-weight: 700; }
.media img.loaded ~ .mono { opacity: 0; visibility: hidden; }
.media img.loaded ~ .mono, .media img.loaded ~ .media-cap { transition: opacity .4s; }
.media img.loaded ~ .media-cap { opacity: 1; }

/* 完整显示（不裁切）——白底拖拍产品图专用 */
.media.fit { background: var(--c-white); }
.media.fit img { object-fit: contain; }

/* corner brackets + frame */
.corners::before, .corners::after { content: ""; position: absolute; width: 22px; height: 22px; z-index: 3; pointer-events: none; }
.corners::before { top: -1px; left: -1px; border-top: 2px solid var(--c-accent); border-left: 2px solid var(--c-accent); }
.corners::after { right: -1px; bottom: -1px; border-right: 2px solid var(--c-accent); border-bottom: 2px solid var(--c-accent); }

/* media caption / meta */
.media-tag { position: absolute; top: 14px; right: 16px; z-index: 3; color: var(--c-accent); font-size: 10px; font-weight: 800; letter-spacing: .14em; }
.media-cap {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 3;
  display: flex; justify-content: space-between; gap: 12px; padding: 40px 18px 15px;
  background: linear-gradient(transparent, rgba(0,0,0,.72));
  color: var(--c-white); font-size: 8px; font-weight: 800; letter-spacing: .16em;
}
.media-cap .cap-sub { color: rgba(255,255,255,.55); }

/* video slot (blank placeholder — paste YouTube / <video> here) */
.video-slot {
  position: relative; overflow: hidden; aspect-ratio: 16 / 10;
  background:
    linear-gradient(rgba(255,159,46,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,159,46,.06) 1px, transparent 1px),
    radial-gradient(circle at 50% 45%, var(--c-vs1) 0%, var(--c-vs2) 78%);
  background-size: 44px 44px, 44px 44px, 100% 100%;
  background-color: var(--c-vs-bg); cursor: pointer;
}
.video-slot .play {
  position: absolute; inset: 0; margin: auto; width: 62px; height: 62px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.32); display: flex; align-items: center; justify-content: center;
  background: rgba(255,159,46,.18); color: var(--c-accent); transition: .25s var(--ease);
}
.video-slot .play svg { width: 20px; height: 20px; fill: currentColor; margin-left: 2px; }
/* 视频封面图：有图时压暗显示，播放按钮与文字仍在上层 */
.video-slot .poster {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: .45; transition: opacity .3s var(--ease), transform .5s var(--ease);
}
.video-slot:hover .poster { opacity: .6; transform: scale(1.03); }
.video-slot .play, .video-slot .slot-num, .video-slot .slot-cap, .video-slot .dur { z-index: 2; }
.video-slot:hover .play { background: var(--c-accent); color: var(--c-accent-ink); transform: scale(1.06); }
.video-slot .slot-num { position: absolute; top: 13px; right: 15px; color: var(--c-accent); font-size: 10px; font-weight: 800; letter-spacing: .12em; }
.video-slot .slot-cap { position: absolute; left: 15px; right: 15px; bottom: 14px; display: flex; justify-content: space-between; color: var(--c-white); font-size: 8px; font-weight: 800; letter-spacing: .16em; text-shadow: 0 1px 6px rgba(0,0,0,.8); }
.video-slot .slot-cap small { color: rgba(255,255,255,.6); }
.video-slot .dur { position: absolute; top: 13px; left: 15px; font-size: 9px; font-weight: 700; color: rgba(255,255,255,.8); letter-spacing: .06em; background: rgba(0,0,0,.55); padding: 2px 7px; }

/* =========================================================
   CARDS
========================================================= */
.card { border: 1px solid var(--c-line2); background: var(--c-cardbg); }
.card-body { padding: 21px; }
.card-label { color: var(--c-t1); font-size: 8px; font-weight: 800; letter-spacing: .15em; margin-bottom: 11px; }
.card h3 { font-size: 19px; line-height: 1.2; margin: 0 0 7px; }
.card p { color: var(--c-t1); font-size: 12.5px; line-height: 1.7; }
.card-link { margin-top: 16px; }

/* home proof grid */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }

/* classified machine gallery (machines.html #gallery) */
.gal-group + .gal-group { margin-top: 40px; }
.gal-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  border-bottom: 1px solid var(--c-line2); padding-bottom: 11px; margin-bottom: 16px;
}
.gal-head h3 { font-size: 16px; letter-spacing: -.02em; margin: 0; }
.gal-head span { color: var(--c-t2); font-size: 8px; font-weight: 800; letter-spacing: .16em; }
.gallery-grid { gap: 14px; }
.gallery-grid .media { background-color: var(--c-white); }
.gallery-grid .shot { margin: 0; }
.gallery-grid .media-cap { padding: 34px 13px 11px; font-size: 7.5px; letter-spacing: .13em; }

/* equipment range by category (solutions.html #range) */
.range-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--c-line2); border-left: 1px solid var(--c-line2); }
.range-item { border-right: 1px solid var(--c-line2); border-bottom: 1px solid var(--c-line2); padding: 26px 24px; background: var(--c-cardbg); }
.range-item .r-num { color: var(--c-accent); font-size: 10px; font-weight: 800; letter-spacing: .14em; }
.range-item h3 { font-size: 18px; letter-spacing: -.02em; margin: 14px 0 10px; }
.range-item p { color: var(--c-t1); font-size: 12.5px; line-height: 1.75; margin: 0; }
.range-notes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 30px; padding-top: 26px; border-top: 1px solid var(--c-line2); }
.range-notes .card-label { margin-bottom: 9px; }
.range-notes p { color: var(--c-t1); font-size: 12.5px; line-height: 1.75; margin: 0; }

/* =========================================================
   MACHINE DETAILS (solutions.html #machines) — 可切换机器详情
========================================================= */
.m-tabs { display: flex; flex-wrap: wrap; gap: 0; border: 1px solid var(--c-line2); background: var(--c-cardbg); margin-bottom: 22px; }
.m-tab {
  flex: 1 1 190px; display: flex; flex-direction: column; align-items: flex-start; gap: 5px;
  padding: 15px 18px; background: none; border: 0; border-right: 1px solid var(--c-line2);
  font-family: inherit; font-size: 14px; font-weight: 700; letter-spacing: -.01em;
  color: var(--c-t1); cursor: pointer; transition: .2s var(--ease); text-align: left;
}
.m-tab:last-child { border-right: 0; }
.m-tab small { font-size: 7.5px; font-weight: 800; letter-spacing: .15em; color: var(--c-t2); }
.m-tab:hover { color: var(--c-ink); background: rgba(0,0,0,.02); }
.m-tab.is-on { color: var(--c-ink); box-shadow: inset 0 -2px 0 var(--c-accent); }
.m-tab.is-on small { color: var(--c-accent-d, #b07d00); }

.m-panel { display: none; }
.m-panel.is-on { display: block; animation: mFade .35s var(--ease); }
@keyframes mFade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.m-top { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 26px; align-items: start; }
.m-info .m-model { display: inline-block; color: var(--c-accent); font-size: 10px; font-weight: 800; letter-spacing: .16em; margin-bottom: 12px; }
.m-info h3 { font-size: 26px; line-height: 1.15; letter-spacing: -.03em; margin: 0 0 12px; }
.m-info > p { color: var(--c-t1); font-size: 13.5px; line-height: 1.8; margin: 0 0 20px; }
.m-specs { list-style: none; margin: 0 0 22px; padding: 0; border-top: 1px solid var(--c-line2); }
.m-specs li { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--c-line2); }
.m-specs li span { color: var(--c-t2); font-size: 8px; font-weight: 800; letter-spacing: .14em; }
.m-specs li b { font-size: 12.5px; font-weight: 600; text-align: right; }
.m-actions { display: flex; flex-wrap: wrap; gap: 10px; }

.m-parts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 30px; padding-top: 26px; border-top: 1px solid var(--c-line2); }
.part { margin: 0; background: var(--c-white); border: 1px solid var(--c-line2); display: flex; flex-direction: column; }
.part-ph { height: 190px; display: flex; align-items: center; justify-content: center; padding: 12px; background: var(--c-white); }
.part-ph img { max-width: 100%; max-height: 100%; object-fit: contain; opacity: 1; }
.part figcaption { border-top: 1px solid var(--c-line2); padding: 15px 16px 18px; }
.part figcaption b { display: block; font-size: 12.5px; letter-spacing: -.01em; margin-bottom: 7px; }
.part figcaption p { color: var(--c-t1); font-size: 11.5px; line-height: 1.7; margin: 0; }

@media (max-width: 900px) {
  .m-top { grid-template-columns: 1fr; }
  .m-parts { grid-template-columns: repeat(2, 1fr); }
  .m-tab { flex: 1 1 46%; border-bottom: 1px solid var(--c-line2); }
}

/* =========================================================
   APPLICATIONS GRID (applications.html) — 行业容器卡
========================================================= */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.app-card { display: flex; flex-direction: column; background: var(--c-white); border: 1px solid var(--c-line2); }
.app-fig {
  position: relative; aspect-ratio: 4 / 3; overflow: hidden;
  background:
    linear-gradient(rgba(16,52,78,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16,52,78,.045) 1px, transparent 1px),
    linear-gradient(180deg, #fbfdfe 0%, var(--c-bg2) 100%);
  background-size: 26px 26px, 26px 26px, 100% 100%;
  display: flex; align-items: flex-end; justify-content: center;
  border-bottom: 1px solid var(--c-line2);
}
.app-vessel { height: 88%; width: auto; color: var(--c-dark); }
.app-vessel .v-t1 { font: 800 11px/1 var(--font-head); fill: var(--c-ink); letter-spacing: .02em; }
.app-vessel .v-t2 { font: 700 8.4px/1 var(--font); fill: var(--c-t1); letter-spacing: .04em; }
.app-photo { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 2; }
.app-num { position: absolute; top: 11px; left: 13px; z-index: 3; color: var(--c-accent); font-size: 10px; font-weight: 800; letter-spacing: .14em; }
.app-note {
  position: absolute; left: 11px; bottom: 11px; z-index: 3;
  background: var(--c-dark); color: #fff; font-size: 7.5px; font-weight: 800;
  letter-spacing: .12em; text-transform: uppercase; padding: 4px 7px;
}
.app-body { padding: 18px 19px 20px; display: flex; flex-direction: column; flex: 1 1 auto; }
.app-body h3 { font-size: 16px; letter-spacing: -.02em; margin: 0 0 8px; }
.app-body p { color: var(--c-t1); font-size: 12px; line-height: 1.65; margin: 0 0 13px; }
.app-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 15px; }
.app-chips .chip { font-size: 7.5px; padding: 4px 7px; }
.app-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: auto; padding-top: 13px; border-top: 1px solid var(--c-line2); }
.app-foot > span { color: var(--c-t2); font-size: 8px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.app-link { color: var(--c-accent); font-size: 11px; font-weight: 800; letter-spacing: .06em; text-decoration: none; }
.app-link:hover { color: var(--c-accent-h); }

.app-photos { margin-top: 42px; }
.app-photos-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px 18px; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--c-line2); }
.app-photos-head h3 { font-size: 17px; margin: 0; }
.app-photos-head span { color: var(--c-t1); font-size: 12px; }

@media (max-width: 1100px) { .app-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .app-grid { grid-template-columns: 1fr; } }

/* =========================================================
   SOLUTIONS EVIDENCE (solutions.html) — 方案 = 图 + 参数 + 验证方式
========================================================= */
.sol2-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.sol2-card { display: flex; flex-direction: column; background: var(--c-white); border: 1px solid var(--c-line2); }
.sol2-fig { position: relative; aspect-ratio: 16 / 10; overflow: hidden; border-bottom: 1px solid var(--c-line2); background: var(--c-card); }
.sol2-fig img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .5s var(--ease); }
.sol2-fig img.loaded { opacity: 1; }
.sol2-num { position: absolute; top: 12px; left: 13px; z-index: 3; color: var(--c-accent); font-size: 11px; font-weight: 800; letter-spacing: .14em; }
.sol2-tag {
  position: absolute; right: 12px; bottom: 11px; z-index: 3;
  background: var(--c-dark); color: #fff; font-size: 7.5px; font-weight: 800;
  letter-spacing: .12em; padding: 4px 7px;
}
.sol2-body { padding: 19px 20px 21px; display: flex; flex-direction: column; flex: 1 1 auto; }
.sol2-body h3 { font-size: 17px; letter-spacing: -.02em; margin: 0 0 9px; }
.sol2-body > p { color: var(--c-t1); font-size: 12.5px; line-height: 1.7; margin: 0 0 14px; }
.sol2-facts { list-style: none; margin: 0 0 16px; padding: 0; }
.sol2-facts li {
  position: relative; padding: 7px 0 7px 17px;
  border-top: 1px dashed var(--c-line); color: var(--c-ink);
  font-size: 10.5px; font-weight: 700; letter-spacing: .03em;
}
.sol2-facts li:last-child { border-bottom: 1px dashed var(--c-line); }
.sol2-facts li::before { content: "✓"; position: absolute; left: 0; color: var(--c-verify); font-weight: 800; }
.sol2-check { margin-top: auto; border-left: 2px solid var(--c-accent); padding: 2px 0 2px 11px; }
.sol2-check b { display: block; color: var(--c-t2); font-size: 7.5px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 3px; }
.sol2-check span { color: var(--c-t1); font-size: 11px; line-height: 1.55; }

.dv-band { margin-top: 34px; padding: 28px 26px 30px; background: var(--c-bg2); border: 1px solid var(--c-line2); }
.dv-head { margin-bottom: 22px; }
.dv-head h3 { font-size: 21px; letter-spacing: -.025em; margin: 8px 0 7px; }
.dv-head p { color: var(--c-t1); font-size: 12.5px; margin: 0; max-width: 620px; }
.dv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.dv-card { background: var(--c-white); border: 1px solid var(--c-line2); padding: 18px 18px 20px; }
.dv-num { color: var(--c-accent); font-size: 10px; font-weight: 800; letter-spacing: .14em; }
.dv-card h4 { font-size: 12px; font-weight: 800; letter-spacing: .1em; margin: 10px 0 8px; }
.dv-card p { color: var(--c-t1); font-size: 11.5px; line-height: 1.7; margin: 0; }

@media (max-width: 1100px) {
  .sol2-grid { grid-template-columns: repeat(2, 1fr); }
  .dv-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) { .sol2-grid, .dv-grid { grid-template-columns: 1fr; } }

/* =========================================================
   SITE SEARCH (videos.html) — 站内 Google 搜索
========================================================= */
.search-band {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 30px; align-items: center;
  background: var(--c-white); border: 1px solid var(--c-line2); padding: 30px 32px;
  position: relative;
}
.search-band::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--c-accent); }
.sb-copy h3 { font-size: 22px; letter-spacing: -.025em; margin: 9px 0 8px; }
.sb-copy p { color: var(--c-t1); font-size: 12.5px; line-height: 1.7; margin: 0; max-width: 420px; }
.sb-form { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; }
.sb-field {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--c-line); background: var(--c-bg2);
  padding: 0 14px; height: 52px; transition: border-color .2s, background .2s;
}
.sb-field:focus-within { border-color: var(--c-accent); background: var(--c-white); }
.sb-field svg { width: 17px; height: 17px; color: var(--c-t2); flex: 0 0 auto; }
.sb-field input {
  border: 0; outline: none; background: none; width: 100%; height: 100%;
  font-family: inherit; font-size: 13.5px; color: var(--c-ink);
}
.sb-field input::placeholder { color: #8595a2; }
.sb-form .btn { height: 52px; }
.sb-note { grid-column: 1 / -1; color: var(--c-t2); font-size: 10px; letter-spacing: .04em; margin: 2px 0 0; }
@media (max-width: 900px) {
  .search-band { grid-template-columns: 1fr; padding: 24px 20px; }
  .sb-form { grid-template-columns: 1fr; }
  .sb-form .btn { width: 100%; justify-content: center; }
}

/* proof card (home + reusable) */
.proof-card { border: 1px solid var(--c-line2); background: var(--c-cardbg); }
.proof-card .card-body { padding: 21px; }

/* application tiles */
.app-tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.app-tiles a { display: flex; align-items: center; justify-content: space-between; gap: 10px; font-size: 9px; }
.app-tiles a::after { content: "→"; color: var(--c-accent); font-size: 14px; }
.app-tiles a:hover { border-color: var(--c-dark); background: var(--c-white); color: var(--c-ink); }

/* machine card (home + machines page) */
.machine-card { background: var(--c-white); border: 1px solid var(--c-line2); }
.machine-card .media { aspect-ratio: 16 / 11; }
.machine-card .info { padding: 20px 21px 22px; }
.machine-card .info .row { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; }
.machine-card .info small { color: var(--c-t2); font-size: 8px; font-weight: 800; letter-spacing: .15em; display: block; margin-bottom: 8px; }
.machine-card .info h3 { font-size: 21px; letter-spacing: -.03em; }
.machine-card .info .num { color: var(--c-accent); font-size: 10px; font-weight: 800; }
.machine-card .chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 18px; }
.machine-card .info p { color: var(--c-t1); font-size: 13px; line-height: 1.7; margin: 0 0 18px; }
.machine-card .info .btn { margin-top: 4px; }

/* 非对称机型布局（首页）：左整机大图 + 右两条横向流水线 */
.mach-split { display: grid; grid-template-columns: 1.32fr 1fr; gap: 18px; align-items: stretch; }
.mach-main { display: flex; flex-direction: column; }
.mach-main .media { flex: 1 1 auto; min-height: 430px; }
.mach-side { display: grid; grid-template-rows: 1fr 1fr; gap: 18px; }
.mach-strip { display: flex; flex-direction: column; }
.mach-strip .media { flex: 1 1 auto; min-height: 172px; display: block; background: var(--c-white); }
.mach-strip .media img { object-fit: contain; }
.mach-strip .info { padding: 15px 18px 17px; }
.mach-strip .info small { margin-bottom: 6px; }
.mach-strip .info h3 { font-size: 18px; }
@media (max-width: 900px) {
  .mach-split { grid-template-columns: 1fr; }
  .mach-main .media { min-height: 320px; }
  .mach-side { grid-template-rows: none; grid-auto-rows: auto; }
  .mach-strip .media { min-height: 150px; }
}
.chip {
  font-size: 8px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase;
  border: 1px solid var(--c-line2); color: var(--c-t1); padding: 5px 9px;
}

/* =========================================================
   SOLUTION ROWS
========================================================= */
.solution-list { border-top: 1px solid var(--c-line); }
.solution-item {
  display: grid; grid-template-columns: 90px 1fr; gap: 40px; align-items: start;
  padding: 46px 0; border-bottom: 1px solid var(--c-line);
}
.solution-item .num { color: var(--c-accent); font-size: 13px; font-weight: 800; letter-spacing: .08em; padding-top: 6px; }
.solution-item h3 { font-size: clamp(24px, 3vw, 34px); letter-spacing: -.04em; margin-bottom: 14px; }
.solution-item h3 span { color: var(--c-t2); }
.solution-item .desc { max-width: 720px; color: var(--c-t1); font-size: 15px; line-height: 1.8; }
.solution-item .meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }

/* =========================================================
   CTA BAND / VIDEO CALL-OUT
========================================================= */
.cta-band {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: center;
}
.cta-band h2 { font-size: clamp(38px, 4.6vw, 58px); line-height: .98; letter-spacing: -.05em; margin-top: 6px; }
.cta-band h2 em { color: var(--c-accent); font-style: normal; }
.cta-band p { max-width: 520px; margin-top: 26px; color: var(--c-t3); font-size: 15px; line-height: 1.8; }
.cta-band .actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; }

/* =========================================================
   CONTACT / FORM
========================================================= */
.contact-grid { display: grid; grid-template-columns: 1fr .9fr; gap: 90px; margin-top: 20px; align-items: start; }
.contact-grid h2 { font-size: clamp(40px, 5vw, 62px); line-height: .98; letter-spacing: -.055em; margin-top: 6px; }
.contact-grid .desc { max-width: 500px; margin-top: 26px; color: var(--c-hi); font-size: 15px; line-height: 1.85; }
.contact-methods { display: flex; flex-direction: column; margin-top: 44px; border-top: 1px solid rgba(255,255,255,.14); }
.method { display: flex; align-items: center; gap: 20px; padding: 22px 0; border-bottom: 1px solid rgba(255,255,255,.1); }
.method .m-ico { width: 40px; height: 40px; flex: none; border: 1px solid var(--c-line-d2); display: flex; align-items: center; justify-content: center; color: var(--c-accent); }
.method .m-ico svg { width: 18px; height: 18px; fill: currentColor; }
.method small { display: block; color: var(--c-lbl); font-size: 8px; font-weight: 800; letter-spacing: .16em; margin-bottom: 4px; }
.method a, .method .val { color: var(--c-white); font-size: 15px; text-decoration: none; }
.method a:hover { color: var(--c-accent); }
.check-list { margin-top: 30px; display: grid; gap: 10px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; color: var(--c-t1); font-size: 13.5px; line-height: 1.6; }
.check-list li::before { content: ""; width: 6px; height: 6px; background: var(--c-accent); margin-top: 8px; flex: none; }
.bg-dark .check-list li { color: var(--c-hi); }

.form { display: flex; flex-direction: column; gap: 24px; }
.form .f-label { display: flex; flex-direction: column; gap: 9px; color: var(--c-lbl); font-size: 8.5px; font-weight: 800; letter-spacing: .16em; }
.form input, .form textarea {
  width: 100%; padding: 11px 0; border: none; border-bottom: 1px solid var(--c-line-d);
  border-radius: 0; background: transparent; color: var(--c-white);
  font-family: inherit; font-size: 14px; resize: vertical; outline: none;
  transition: border-color .2s;
}
.form input::placeholder, .form textarea::placeholder { color: #8595a2; }
.form input:focus, .form textarea:focus { border-bottom-color: var(--c-accent); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.form-note { color: #6f8494; font-size: 11px; letter-spacing: .02em; line-height: 1.6; }

/* =========================================================
   RFQ 询价表单（contact / index）
========================================================= */
.rfq-wrap { position: relative; }
.rfq {
  border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.035);
  padding: 30px 28px 26px;
}
.rfq-head { padding-bottom: 22px; border-bottom: 1px solid rgba(255,255,255,.16); }
.rfq-tag {
  display: inline-block; font: 800 8.5px/1 var(--font-head); letter-spacing: .18em;
  color: var(--c-dark); background: var(--c-accent); padding: 6px 9px; margin-bottom: 14px;
}
.rfq-head h3 { color: var(--c-white); font-size: clamp(21px, 2.1vw, 27px); line-height: 1.18; letter-spacing: -.03em; margin: 0; }
.rfq-head p { margin: 12px 0 0; color: var(--c-t3); font-size: 12.5px; line-height: 1.7; }

.rfq-step { border: none; margin: 0; padding: 24px 0 4px; border-bottom: 1px dashed rgba(255,255,255,.14); }
.rfq-step.is-last { border-bottom: none; padding-bottom: 0; }
.rfq-step-h {
  display: flex; align-items: center; gap: 10px; margin-bottom: 18px;
  font: 800 8.5px/1 var(--font-head); letter-spacing: .18em; color: var(--c-lbl); text-transform: uppercase;
}
.rfq-step-h .rfq-no { color: var(--c-accent); }
.rfq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 26px; }
.rfq .span2 { grid-column: 1 / -1; }

.rfq .f-label { display: flex; flex-direction: column; gap: 8px; color: var(--c-lbl); font-size: 8.5px; font-weight: 800; letter-spacing: .16em; }
.rfq .f-label > span { display: flex; align-items: baseline; gap: 6px; }
.rfq .f-label em { color: var(--c-accent); font-style: normal; }
.rfq input, .rfq textarea {
  width: 100%; padding: 10px 0; border: none; border-bottom: 1px solid var(--c-line-d);
  border-radius: 0; background: transparent; color: var(--c-white);
  font-family: inherit; font-size: 13.5px; resize: vertical; outline: none;
  transition: border-color .2s;
}
.rfq input::placeholder, .rfq textarea::placeholder { color: #7d8f9d; font-size: 12.5px; }
.rfq input:focus, .rfq textarea:focus { border-bottom-color: var(--c-accent); }
.rfq input.is-bad, .rfq textarea.is-bad { border-bottom-color: #ff7a6b; }
.rfq-grid .notice {
  grid-column: 1 / -1; color: #ff9b90; font-size: 11px; letter-spacing: .02em;
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font: 800 8.5px/1 var(--font-head); letter-spacing: .14em; text-transform: uppercase;
  color: rgba(255,255,255,.82); background: transparent;
  border: 1px solid rgba(255,255,255,.22); padding: 10px 12px; cursor: pointer;
  transition: .16s ease;
}
.chip:hover { border-color: var(--c-accent); color: var(--c-accent); }
.chip.is-on { background: var(--c-accent); border-color: var(--c-accent); color: var(--c-dark); }

.rfq-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
/* 蜜罐字段：真人看不见，只有机器人会填 */
.rfq-hp {
  position: absolute !important; left: -9999px !important; top: 0 !important;
  width: 1px !important; height: 1px !important; opacity: 0 !important;
  pointer-events: none !important;
}
.rfq .form-note { margin-top: 18px; }

.rfq-done { border: 1px solid var(--c-accent); background: rgba(223,255,0,.05); padding: 30px 28px; }
.rfq-done-ico {
  display: flex; align-items: center; justify-content: center; width: 38px; height: 38px;
  background: var(--c-accent); color: var(--c-dark); font-size: 19px; font-weight: 800; margin-bottom: 18px;
}
.rfq-done h3 { color: var(--c-white); font-size: clamp(19px, 1.9vw, 24px); letter-spacing: -.03em; margin: 0 0 10px; }
.rfq-done > p { margin: 0; color: var(--c-t3); font-size: 12.5px; line-height: 1.7; }
.rfq-done-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 22px 0 0; }
.rfq-done-text {
  margin: 22px 0 0; padding: 16px; max-height: 220px; overflow: auto;
  background: rgba(0,0,0,.3); border: 1px solid rgba(255,255,255,.14);
  color: var(--c-t3); font: 11.5px/1.65 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap; word-break: break-word;
}
.rfq-done .link-arrow { margin-top: 18px; }
.rfq-done.is-ok .rfq-done-ico { background: var(--c-accent); }
.rfq-done.is-bad { border-color: #ff7a6b; background: rgba(255,122,107,.05); }
.rfq-done.is-bad .rfq-done-ico { background: #ff7a6b; color: #fff; }

@media (max-width: 620px) {
  .rfq { padding: 24px 18px 22px; }
  .rfq-grid { grid-template-columns: 1fr; }
  .rfq-actions .btn, .rfq-done-actions .btn { width: 100%; justify-content: center; }
}

/* =========================================================
   FOOTER
========================================================= */
.site-footer { background: var(--c-dark); color: var(--c-white); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 46px; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-brand { font-size: 20px; font-weight: 800; letter-spacing: .14em; }
.footer-tag { margin-top: 14px; color: var(--c-lbl); font-size: 12px; line-height: 1.7; max-width: 300px; }
.footer-col h4 { font-size: 9px; font-weight: 800; letter-spacing: .18em; color: var(--c-lbl); margin-bottom: 20px; text-transform: uppercase; }
.footer-col ul { display: grid; gap: 12px; }
.footer-col a { color: #cad8e2; font-size: 13px; text-decoration: none; }
.footer-col a:hover { color: var(--c-accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; padding: 24px 0; color: var(--c-dim); font-size: 9px; font-weight: 700; letter-spacing: .12em; }
.footer-bottom .fb-links { display: flex; gap: 26px; align-items: center; }
.footer-bottom a { color: var(--c-t3); text-decoration: none; }
.footer-bottom a:hover { color: var(--c-accent); }

/* back to top */
.to-top {
  position: fixed; right: 22px; bottom: 92px; z-index: 80; /* 92px：为右下角悬浮 WhatsApp 球让位 */
  width: 46px; height: 46px; border: 1px solid var(--c-line2); background: rgba(255,255,255,.92);
  color: var(--c-ink); display: flex; align-items: center; justify-content: center;
  text-decoration: none; font-size: 18px; opacity: 0; pointer-events: none; transition: .25s;
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { background: var(--c-accent); border-color: var(--c-accent); }

/* =========================================================
   HERO VIDEO POSTER (home)
========================================================= */
.hero-video { position: relative; cursor: pointer; }
.hero-video .play {
  position: absolute; inset: 0; margin: auto; z-index: 3;
  width: 74px; height: 74px; border-radius: 50%;
  background: var(--c-accent); color: var(--c-accent-ink);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 30px rgba(255,159,46,.35);
  transition: transform .25s var(--ease), background .2s;
}
.hero-video .play svg { width: 24px; height: 24px; fill: currentColor; margin-left: 3px; }
.hero-video:hover .play { transform: scale(1.08); background: var(--c-accent-h); }
.hero-video .hv-tag {
  position: absolute; top: 16px; left: 16px; z-index: 3;
  background: rgba(20,20,20,.72); border: 1px solid rgba(255,255,255,.16);
  color: var(--c-accent); font-size: 8px; font-weight: 800; letter-spacing: .18em;
  padding: 6px 10px; text-transform: uppercase; backdrop-filter: blur(3px);
}
.hero-video .hv-cap {
  position: absolute; left: 18px; right: 18px; bottom: 16px; z-index: 3;
  display: flex; justify-content: space-between; align-items: flex-end; gap: 12px;
  color: var(--c-white); font-family: var(--font-head);
  font-size: 12px; font-weight: 700; letter-spacing: .01em;
  text-shadow: 0 1px 10px rgba(0,0,0,.55);
}
.hero-video .hv-cap small { font-size: 8px; font-weight: 800; letter-spacing: .16em; color: rgba(255,255,255,.55); text-transform: uppercase; }

/* =========================================================
   FOOTER TRUST BADGES
========================================================= */
.footer-badges {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 26px;
  padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-badges .fb-item { display: inline-flex; align-items: center; gap: 8px; color: #a9bcc9; font-size: 9px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.footer-badges .fb-item b { color: var(--c-accent); font-weight: 800; font-size: 12px; font-family: var(--font-head); }
.footer-badges .fb-item svg { width: 13px; height: 13px; fill: var(--c-verify); opacity: .95; }

/* =========================================================
   FAQ ACCORDION (native details)
========================================================= */
.faq-list { border-top: 1px solid var(--c-line); }
.faq-item { border-bottom: 1px solid var(--c-line); }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 24px 4px; font-family: var(--font-head); font-size: 16.5px; font-weight: 700; letter-spacing: -.01em; color: var(--c-ink);
  transition: color .18s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: #c07f00; }
.faq-item summary .plus {
  flex: none; width: 30px; height: 30px; border: 1px solid var(--c-line2); color: var(--c-t2);
  display: inline-flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 300; transition: .25s var(--ease);
}
.faq-item[open] summary .plus { transform: rotate(45deg); background: var(--c-accent); border-color: var(--c-accent); color: var(--c-accent-ink); }
.faq-answer { padding: 0 4px 26px; color: var(--c-t1); font-size: 14px; line-height: 1.85; max-width: 840px; }

/* =========================================================
   TRUST STRIP INSIDE HERO (home, below headline)
========================================================= */
.hero-proof { display: flex; flex-wrap: wrap; gap: 8px 26px; margin-top: 26px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.1); }
.hero-proof span { display: inline-flex; align-items: center; gap: 9px; color: #a9bcc9; font-size: 10px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.hero-proof b { color: var(--c-accent); font-family: var(--font-head); font-size: 15px; font-weight: 800; }

/* =========================================================
   PROOF PAGE
========================================================= */
.pillar-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.pillar { border: 1px solid var(--c-line2); background: var(--c-cardbg); padding: 30px 28px; }
.pillar .p-num { color: var(--c-accent); font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.pillar h3 { font-size: 21px; margin: 18px 0 12px; }
.pillar p { color: var(--c-t1); font-size: 13.5px; line-height: 1.75; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.stat { border: 1px solid rgba(255,255,255,.14); padding: 28px 22px; }
.stat .v { font-size: clamp(30px, 4vw, 46px); font-weight: 800; letter-spacing: -.04em; color: var(--c-accent); }
.stat .k { margin-top: 8px; color: var(--c-lbl); font-size: 8px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }

/* cert mark */
.cert-mark {
  position: relative; width: 150px; height: 150px; margin: 0 auto;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  border: 1px solid var(--c-line); background: var(--c-white);
}
  .cert-mark .cross { position: absolute; inset: 11px; border: 1px dashed #d5e0e8; }
.cert-mark strong { font-size: 36px; letter-spacing: -.08em; color: var(--c-ink); }
.cert-mark span { margin-top: 4px; color: var(--c-t2); font-size: 7px; font-weight: 800; letter-spacing: .18em; }

/* =========================================================
   VIDEO LIBRARY
========================================================= */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.filter-btn {
  border: 1px solid var(--c-line); background: var(--c-white); color: var(--c-t1);
  font-size: 9px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
  padding: 9px 16px; cursor: pointer; transition: .18s;
}
.filter-btn:hover { border-color: var(--c-dark); color: var(--c-ink); }
.filter-btn.is-on { background: var(--c-dark); border-color: var(--c-dark); color: var(--c-accent); }

.video-card { border: 1px solid var(--c-line2); background: var(--c-cardbg); }
.video-card .body { padding: 18px 20px 20px; }
.video-card .body small { color: var(--c-accent); font-size: 8px; font-weight: 800; letter-spacing: .15em; display: block; margin-bottom: 8px; background: var(--c-dark); padding: 4px 8px; width: max-content; }
.video-card h3 { font-size: 16.5px; margin-bottom: 6px; }
.video-card p { color: var(--c-t1); font-size: 12px; line-height: 1.65; }

/* =========================================================
   MISC
========================================================= */
.divider { height: 1px; background: var(--c-line); border: none; margin: 0; }
.badge-row { display: flex; flex-wrap: wrap; gap: 10px; }
.badge { display: inline-block; border: 1px solid var(--c-line-d2); color: var(--c-t3); font-size: 8px; font-weight: 800; letter-spacing: .14em; padding: 6px 12px; text-transform: uppercase; }
.badge.on-dark { color: var(--c-lbl); }

/* page intro band (light) */
.page-intro { display: grid; grid-template-columns: .3fr 1fr; gap: 80px; align-items: end; padding-bottom: 40px; border-bottom: 1px solid var(--c-line); margin-bottom: 60px; }
.page-intro h2 { font-size: clamp(30px, 3.4vw, 42px); letter-spacing: -.04em; }
.page-intro p { max-width: 600px; margin-top: 16px; color: var(--c-t1); font-size: 15px; line-height: 1.8; }

/* =========================================================
   ANIMATIONS (light)
========================================================= */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* =========================================================
   RTL (Arabic)
========================================================= */
[dir="rtl"] body { text-align: right; }
[dir="rtl"] .btn .arrow { transform: rotate(180deg); }
[dir="rtl"] .btn:hover .arrow { transform: rotate(180deg) translateX(4px); }
[dir="rtl"] .link-arrow .arrow { transform: rotate(180deg); }
[dir="rtl"] .link-arrow:hover .arrow { transform: rotate(180deg) translateX(5px); }
[dir="rtl"] .media-tag { right: auto; left: 16px; }
[dir="rtl"] .video-slot .slot-num { right: auto; left: 15px; }
[dir="rtl"] .video-slot .dur { left: auto; right: 15px; }
[dir="rtl"] .hero-bottom span + span { border-left: none; border-right: 1px solid rgba(255,255,255,.1); padding-left: 0; padding-right: 20px; }
[dir="rtl"] .lang-menu { right: auto; left: 0; }

/* =========================================================
   RESPONSIVE
========================================================= */
@media (max-width: 1100px) {
  .main-nav a { padding: 9px 8px; font-size: 10px; }
  .header-inner { gap: 14px; }
}

@media (max-width: 996px) {
  .container { --gutter: 20px; }

  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; top: 74px; left: 0; right: 0; bottom: 0; z-index: 89;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--c-dark3); padding: 18px 20px 40px;
    transform: translateY(-8px); opacity: 0; visibility: hidden; transition: .25s var(--ease);
    overflow-y: auto; margin-left: 0;
  }
  .main-nav.open { transform: none; opacity: 1; visibility: visible; }
  .main-nav a { font-size: 13px; padding: 15px 10px; border-bottom: 1px solid rgba(255,255,255,.07); }
  .main-nav .nav-wa { margin: 14px 0 0; justify-content: center; border: 1px solid var(--c-line-d2); }

  .hero { padding-top: 70px; }
  .hero-layout { grid-template-columns: 1fr; gap: 52px; }

  .sec-head, .page-intro { grid-template-columns: 1fr; gap: 20px; }
  .grid-4, .stat-grid { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .app-tiles { grid-template-columns: 1fr 1fr; }
  .pillar-grid { grid-template-columns: 1fr; }
  .contact-grid, .cta-band { grid-template-columns: 1fr; gap: 56px; }
  .solution-item { grid-template-columns: 60px 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .container { --gutter: 15px; }
  .section { padding: 74px 0; }
  .hero { min-height: auto; padding: 46px 0 30px; }
  .hero .topline { font-size: 7px; letter-spacing: .12em; }
  .hero h1 { font-size: 46px; }
  .hero-desc { font-size: 14px; }
  .hero-actions .btn { width: 100%; }
  .hero-bottom { grid-template-columns: 1fr 1fr; row-gap: 4px; }
  .hero-bottom span { padding: 12px 0; }
  .subhero { padding: 56px 0 46px; }
  .subhero h1 { font-size: 42px; }
  .sec-head { padding-bottom: 34px; margin-bottom: 34px; }
  .sec-title { font-size: 38px; }
  .sec-lead { font-size: 14px; }
  .grid-3, .grid-4, .stat-grid, .grid-2 { grid-template-columns: 1fr; gap: 14px; }
  .app-tiles { grid-template-columns: 1fr 1fr; gap: 10px; }
  .solution-item { grid-template-columns: 1fr; gap: 10px; padding: 34px 0; }
  .solution-item .desc { font-size: 14px; }
  .form-row { grid-template-columns: 1fr; gap: 22px; }
  .contact-methods { margin-top: 30px; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 12px; }
  .media-tag, .video-slot .dur { font-size: 9px; }
  .cta-band { gap: 44px; }
  .cta-band h2 { font-size: 36px; }
  .to-top { width: 40px; height: 40px; right: 14px; bottom: 14px; }
  .top-strip .ts-left { display: none; }
  .top-strip .container { justify-content: flex-end; }
  .top-strip .sep { display: none; }
  .top-strip .ts-right { gap: 12px; }
  .hero-video .play { width: 60px; height: 60px; }
  .hero-video .hv-cap { font-size: 11px; }
  .faq-item summary { font-size: 15px; padding: 20px 2px; }
  .faq-answer { font-size: 13.5px; }
  .footer-badges { gap: 10px 18px; }
  /* grid overlay density on mobile */
  .bg-dark::before, .bg-white-grid::after, .bg-gray-grid::after { background-size: 90px 90px; }
  .media, .video-slot { background-size: 90px 90px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* =========================================================
   FLOATING CONTACT — 右下角 WhatsApp 球（点击展开 WhatsApp / Email）
   · 滚动过首屏后才出现 · 轻呼吸引导 3~5s 后静止（不闪烁）
   · 滚到页脚区自动收起，避免与页脚联系链接重叠
   结构由 js/main.js 注入，各页面自动生效
========================================================= */
.fc {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 95;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
}
.fc.on { opacity: 1; visibility: visible; transform: none; }

.fc-main {
  position: relative;
  width: 58px; height: 58px;
  margin: 0; padding: 0;
  border: 0; border-radius: 50%;
  background: #25d366;   /* WhatsApp 绿 — 可辨识度优先 */
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(20,20,20,.32), 0 2px 10px rgba(37,211,102,.35);
  transition: transform .2s var(--ease), background .2s;
}
.fc-main:hover { transform: translateY(-2px) scale(1.05); background: #1fbd5a; }
.fc-main:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 3px; }
.fc-main svg { width: 30px; height: 30px; fill: currentColor; }

/* 轻呼吸引导环（非闪烁；出现后 ~4s 自动静止） */
.fc-ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid rgba(37, 211, 102, .55);
  opacity: 0; pointer-events: none;
}
.fc.breath .fc-ring { animation: fcPing 1.5s ease-out infinite; }
@keyframes fcPing {
  0%   { transform: scale(1); opacity: .75; }
  70%  { transform: scale(1.55); opacity: 0; }
  100% { transform: scale(1.55); opacity: 0; }
}

.fc-panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + 14px);
  width: 264px;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: 12px;
  box-shadow: 0 18px 44px rgba(20,20,20,.16);
  padding: 12px 12px 10px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transform: translateY(8px);
  transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
}
.fc.is-open .fc-panel { opacity: 1; visibility: visible; pointer-events: auto; transform: none; }

.fc-head {
  display: block;
  font-size: 8px; font-weight: 800; letter-spacing: .16em;
  text-transform: uppercase; color: var(--c-dim);
  padding: 2px 6px 10px;
  border-bottom: 1px solid var(--c-line);
}

.fc-row {
  display: flex; align-items: center; gap: 11px;
  padding: 10px 6px;
  border-radius: 8px;
  text-decoration: none;
}
.fc-row:hover { background: var(--c-amber-soft); }
.fc-ico {
  flex: 0 0 34px; width: 34px; height: 34px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--c-dark);
  color: #fff;
}
.fc-wa .fc-ico { background: #25d366; }
.fc-ico svg { width: 17px; height: 17px; fill: currentColor; }
.fc-mail .fc-ico svg { fill: none; stroke: currentColor; stroke-width: 1.8; }
.fc-tx { display: flex; flex-direction: column; min-width: 0; gap: 1px; }
.fc-tx b {
  font-family: var(--font-head);
  font-size: 11px; font-weight: 800; letter-spacing: .1em;
  text-transform: uppercase;
}
.fc-tx small { font-size: 10px; color: var(--c-t1); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 手机端收紧 + 与「回到顶部」错位 */
@media (max-width: 640px) {
  .fc { right: 14px; bottom: 14px; }
  .fc-main { width: 52px; height: 52px; }
  .fc-main svg { width: 27px; height: 27px; }
  .to-top { right: 14px; bottom: 78px; }
}

/* 悬浮面板展开时，将右上方的“回到顶部”隐藏，避免被面板遮挡 */
body.fc-open .to-top { opacity: 0; pointer-events: none; }

/* =========================================================
   瓶子方案 / 液体方案（applications.html）
========================================================= */

/* 分段入口条 */
.seg-nav { background: var(--c-dark2); border-bottom: 1px solid rgba(255, 255, 255, .09); }
.seg-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 10px; padding: 15px 0; }
.seg {
  font: 800 10px/1 var(--font-head); letter-spacing: .14em; text-transform: uppercase;
  color: var(--c-t3); padding: 11px 16px; border: 1px solid rgba(255, 255, 255, .2);
  text-decoration: none; transition: .18s;
}
.seg:hover, .seg.is-on { background: var(--c-accent); border-color: var(--c-accent); color: var(--c-accent-ink); }
.seg-hint { margin-left: auto; color: var(--c-t3); font-size: 11px; letter-spacing: .01em; }

/* 底部补一句的提示 */
.grid-note {
  margin-top: 22px; padding-top: 14px; border-top: 1px dashed var(--c-line);
  color: var(--c-t1); font-size: 12px; line-height: 1.7;
}

/* 液体材料卡 */
.liq-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.liq-card {
  display: flex; flex-direction: column; background: var(--c-white);
  border: 1px solid var(--c-line2); padding: 20px 17px 17px;
}
.liq-top { display: flex; align-items: center; gap: 9px; margin-bottom: 9px; }
.liq-num { font: 800 9px/1 var(--font-head); letter-spacing: .12em; color: var(--c-t3); }
.liq-swatch {
  width: 12px; height: 12px; border-radius: 50%; background: var(--sw, var(--c-t3));
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .14);
}
.liq-card h3 { font-size: 14.5px; margin: 0; }
.liq-desc { color: var(--c-t1); font-size: 11.5px; line-height: 1.6; margin: 0 0 15px; }
.liq-meter {
  display: grid; gap: 8px; padding: 13px 0;
  border-top: 1px solid var(--c-line2); border-bottom: 1px solid var(--c-line2);
}
.lm { display: grid; grid-template-columns: 62px 1fr 62px; align-items: center; gap: 8px; }
.lm-k { font: 800 7.4px/1 var(--font-head); letter-spacing: .1em; color: var(--c-t2); }
.lm-bar { height: 4px; background: var(--c-line); position: relative; }
.lm-bar i { position: absolute; left: 0; top: 0; bottom: 0; background: var(--c-accent); }
.lm-v { font: 700 8.6px/1.2 var(--font); color: var(--c-t1); text-align: right; }
.liq-way {
  margin: 13px 0 14px; font: 800 8px/1.5 var(--font-head); letter-spacing: .12em;
  text-transform: uppercase; color: var(--c-ink);
}
.liq-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  margin-top: auto; padding-top: 13px; border-top: 1px solid var(--c-line2);
}
.liq-foot > span { color: var(--c-t2); font-size: 8px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }

/* 卡片内的视频条：瓶子/液体图在上，实测视频在下（只作检索入口） */
.video-strip {
  display: flex; align-items: center; gap: 10px; margin: 0 0 14px;
  padding: 10px 12px; background: var(--c-bg2); border: 1px solid var(--c-line2);
  text-decoration: none; transition: .16s;
}
.video-strip:hover { background: var(--c-dark); border-color: var(--c-dark); }
.video-strip:hover .vs-txt b { color: #fff; }
.video-strip:hover .vs-txt small { color: var(--c-t3); }
.video-strip .vs-play {
  flex: none; width: 24px; height: 24px; display: grid; place-items: center;
  background: var(--c-accent); color: var(--c-accent-ink); border-radius: 50%;
}
.video-strip .vs-play svg { width: 13px; height: 13px; fill: currentColor; }
.video-strip .vs-txt { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.video-strip .vs-txt b {
  font: 800 9.4px/1 var(--font-head); letter-spacing: .1em;
  text-transform: uppercase; color: var(--c-ink); transition: .16s;
}
.video-strip .vs-txt small { font-size: 10px; color: var(--c-t1); transition: .16s; }
.video-strip .vs-arrow { margin-left: auto; color: var(--c-accent); font-weight: 800; }

/* 锚点滚动时留出吸顶高度 */
#bottles, #liquids { scroll-margin-top: 76px; }

/* =========================================================
   资质证书 / 包装发运 / 发运流程（proof.html）
========================================================= */
.cert-grid, .pack-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cert-card, .pack-card { display: flex; flex-direction: column; background: var(--c-white); border: 1px solid var(--c-line2); }
.cert-card .frame, .pack-card .frame {
  position: relative; aspect-ratio: 4 / 3; overflow: hidden;
  background-color: var(--c-bg2);
  background-image: linear-gradient(var(--c-line2) 1px, transparent 1px),
                    linear-gradient(90deg, var(--c-line2) 1px, transparent 1px);
  background-size: 26px 26px;
  display: flex; align-items: center; justify-content: center;
}
.cert-card .frame::before, .pack-card .frame::before {
  content: ''; position: absolute; inset: 13px; border: 1px dashed var(--c-t3); opacity: .65;
}
.cert-card .slot, .pack-card .slot {
  position: relative; font: 800 8.4px/1 var(--font-head); letter-spacing: .18em;
  color: var(--c-t2); text-transform: uppercase;
}
.cert-card .frame img, .pack-card .frame img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 2;
}
.cert-card .cbody, .pack-card .cbody { padding: 16px 16px 18px; }
.cert-card .cnum, .pack-card .cnum {
  display: block; font: 800 8px/1 var(--font-head); letter-spacing: .14em;
  color: var(--c-accent); margin-bottom: 8px;
}
.cert-card h3, .pack-card h3 { font-size: 12.5px; margin: 0 0 7px; letter-spacing: .03em; }
.cert-card p, .pack-card p { margin: 0; color: var(--c-t1); font-size: 11.5px; line-height: 1.6; }

/* 工厂与产线（proof.html 01） */
.fac-hero {
  position: relative; overflow: hidden; aspect-ratio: 21 / 9;
  border: 1px solid var(--c-line2); background: var(--c-bg2); margin-bottom: 18px;
}
.fac-hero img { width: 100%; height: 100%; object-fit: cover; display: block; }
.fac-hero .fcap {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 34px 20px 16px;
  background: linear-gradient(to top, rgba(6,8,8,.88), rgba(6,8,8,0));
  display: flex; justify-content: space-between; align-items: flex-end; gap: 16px;
}
.fac-hero .fcap b { display: block; color: var(--c-white); font: 800 11px/1 var(--font-head); letter-spacing: .16em; text-transform: uppercase; }
.fac-hero .fcap small { display: block; margin-top: 7px; color: rgba(255,255,255,.72); font-size: 11px; letter-spacing: .05em; line-height: 1.5; }
.fac-hero .fcap i { font: 800 10px/1 var(--font-head); font-style: normal; letter-spacing: .16em; color: var(--c-accent); white-space: nowrap; }

.fac-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.fac-card { display: flex; flex-direction: column; background: var(--c-white); border: 1px solid var(--c-line2); }
.fac-card .frame {
  position: relative; aspect-ratio: 16 / 10; overflow: hidden;
  background-color: var(--c-bg2);
  background-image: linear-gradient(var(--c-line2) 1px, transparent 1px),
                    linear-gradient(90deg, var(--c-line2) 1px, transparent 1px);
  background-size: 26px 26px;
  display: flex; align-items: center; justify-content: center;
}
.fac-card .frame::before { content: ''; position: absolute; inset: 13px; border: 1px dashed var(--c-t3); opacity: .65; }
.fac-card .slot {
  position: relative; font: 800 8.4px/1 var(--font-head); letter-spacing: .18em;
  color: var(--c-t2); text-transform: uppercase;
}
.fac-card .frame img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 2; }
.fac-card .cbody { padding: 16px 16px 18px; }
.fac-card .cnum {
  display: block; font: 800 8px/1 var(--font-head); letter-spacing: .14em;
  color: var(--c-accent); margin-bottom: 8px;
}
.fac-card h3 { font-size: 12.5px; margin: 0 0 7px; letter-spacing: .03em; }
.fac-card p { margin: 0; color: var(--c-t1); font-size: 11.5px; line-height: 1.6; }

.step-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.step-card { background: var(--c-white); border: 1px solid var(--c-line2); padding: 20px 18px 18px; }
.step-card .p-num {
  display: block; font: 800 9px/1 var(--font-head); letter-spacing: .14em;
  color: var(--c-accent); margin-bottom: 10px;
}
.step-card h3 { font-size: 13.5px; margin: 0 0 8px; }
.step-card p { margin: 0; color: var(--c-t1); font-size: 11.5px; line-height: 1.6; }

/* 设计图纸 / 产线布置（solutions.html 04，深色底上的图纸） */
.dwg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.dwg-card { display: flex; flex-direction: column; background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.14); }
.dwg-card .frame {
  position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #e6e6db;
  display: flex; align-items: center; justify-content: center; border-bottom: 1px solid rgba(255,255,255,.14);
}
.dwg-card .frame img { width: 100%; height: 100%; object-fit: contain; display: block; transition: transform .35s ease; }
.dwg-card .frame:hover img { transform: scale(1.04); }
.dwg-card .frame::after {
  content: ''; position: absolute; left: 0; top: 0; width: 26px; height: 26px;
  border-left: 2px solid var(--c-accent); border-top: 2px solid var(--c-accent);
}
.dwg-open {
  position: absolute; right: 0; bottom: 0; z-index: 2;
  font: 800 8px/1 var(--font-head); letter-spacing: .16em; text-transform: uppercase;
  color: var(--c-dark); background: var(--c-accent); padding: 7px 10px;
  opacity: 0; transform: translateY(6px); transition: .2s ease;
}
.dwg-card .frame:hover .dwg-open, .dwg-card .frame:focus-visible .dwg-open { opacity: 1; transform: translateY(0); }
.dwg-card .cbody { padding: 18px 18px 20px; }
.dwg-card .cnum { display: block; font: 800 8px/1 var(--font-head); letter-spacing: .18em; color: var(--c-accent); }
.dwg-card h3 { color: var(--c-white); font-size: 13px; margin: 9px 0 8px; letter-spacing: .03em; }
.dwg-card p { margin: 0; color: var(--c-t3); font-size: 11.5px; line-height: 1.65; }
.dwg-flabel {
  display: block; margin: 16px 0 8px; font: 800 8px/1 var(--font-head);
  letter-spacing: .18em; text-transform: uppercase; color: rgba(255,255,255,.5);
}
.dwg-flow { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; }
.dwg-flow li {
  font: 800 8.4px/1 var(--font-head); letter-spacing: .13em; text-transform: uppercase;
  color: var(--c-white); background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.16); padding: 6px 9px;
}

@media (max-width: 1000px) {
  .cert-grid, .pack-grid, .step-grid, .fac-grid { grid-template-columns: repeat(2, 1fr); }
  .dwg-grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .cert-grid, .pack-grid, .step-grid, .fac-grid { grid-template-columns: 1fr; }
  .fac-hero { aspect-ratio: 16 / 11; }
}

/* =========================================================
   站内搜索结果（videos.html #search，纯静态索引）
========================================================= */
.sb-results {
  grid-column: 1 / -1; margin-top: 18px; background: var(--c-white);
  border: 1px solid var(--c-line); box-shadow: 0 18px 40px rgba(16, 52, 78, .10);
  max-height: 460px; overflow-y: auto;
}
.sb-results[hidden] { display: none; }
.sr { display: block; padding: 14px 16px; border-bottom: 1px solid var(--c-line2); text-decoration: none; transition: .14s; }
.sr:last-of-type { border-bottom: none; }
.sr:hover { background: var(--c-bg2); }
.sr-top { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; margin-bottom: 5px; }
.sr-cat {
  flex: none; font: 800 7.6px/1 var(--font-head); letter-spacing: .12em; text-transform: uppercase;
  color: var(--c-accent-ink); background: var(--c-accent); padding: 5px 7px;
}
.sr-t { font: 700 13px/1.35 var(--font-head); color: var(--c-ink); letter-spacing: -.01em; }
.sr-x { display: block; color: var(--c-t1); font-size: 11.5px; line-height: 1.6; }
.sr b { color: var(--c-accent-ink); background: rgba(255, 159, 46, .3); font-weight: 800; }
.sr-none { margin: 0; padding: 16px; color: var(--c-t1); font-size: 12.5px; }
.sr-foot { padding: 12px 16px; background: var(--c-bg2); border-top: 1px solid var(--c-line2); }
.sr-foot a { color: var(--c-t1); font-size: 11px; letter-spacing: .04em; text-decoration: none; }
.sr-foot a:hover { color: var(--c-ink); text-decoration: underline; }

/* =========================================================
   通用信任位：资质证书 + 包装发运（4 个内容页共用）
========================================================= */
.trust-band {
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 30px; align-items: center;
  padding: 30px 32px; background: var(--c-white); border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-accent);
}
.tb-copy h3 { font-size: 21px; letter-spacing: -.02em; margin: 10px 0; }
.tb-copy p { color: var(--c-t1); font-size: 12.5px; line-height: 1.7; margin: 0 0 16px; max-width: 520px; }
.tb-slots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.tb-slot {
  display: flex; flex-direction: column; gap: 7px; justify-content: center;
  aspect-ratio: 3 / 2; padding: 11px; text-decoration: none;
  border: 1px dashed var(--c-t3); background: var(--c-bg2); transition: .16s;
}
.tb-slot:hover { border-style: solid; border-color: var(--c-accent); background: var(--c-white); }
.tb-num { font: 800 7.6px/1 var(--font-head); letter-spacing: .14em; color: var(--c-t3); }
.tb-slot b {
  font: 800 9.6px/1.3 var(--font-head); letter-spacing: .08em;
  color: var(--c-ink); text-transform: uppercase;
}
@media (max-width: 900px) {
  .trust-band { grid-template-columns: 1fr; padding: 24px 20px; gap: 22px; }
}
@media (max-width: 560px) {
  .tb-slots { grid-template-columns: repeat(2, 1fr); }
}

/* =========================================================
   YouTube 点击播放（js/youtube.js）
========================================================= */
.video-slot, .video-strip { position: relative; }
.video-slot[data-yt], .video-strip[data-yt] { cursor: pointer; }
.video-slot[data-yt]:focus-visible, .video-strip[data-yt]:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }
.yt-frame { position: absolute; inset: 0; z-index: 6; background: #000; }
.yt-frame iframe { width: 100%; height: 100%; border: 0; display: block; }
/* 播放中：藏掉封面上的装饰层 */
.is-playing .play, .is-playing .dur, .is-playing .slot-num, .is-playing .slot-cap,
.is-playing .vs-play, .is-playing .vs-txt, .is-playing .vs-arrow,
.is-playing .poster, .is-playing .media-tag, .is-playing .media-cap { display: none !important; }
/* 视频条就地展开成 16:9 */
.video-strip.is-playing { display: block; padding: 0; border-color: var(--c-dark); background: var(--c-dark); }
.video-strip.is-playing .yt-frame { position: relative; inset: auto; aspect-ratio: 16 / 9; }
/* 没有视频 ID 时的提示 */
.yt-note {
  position: absolute; left: 10px; right: 10px; bottom: 10px; z-index: 7;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 10px 12px; background: rgba(13, 43, 65, .95); color: #fff;
  font-size: 11px; line-height: 1.5; border-left: 2px solid var(--c-accent);
}
.yt-note a {
  color: var(--c-accent); font-weight: 800; font-size: 9px;
  letter-spacing: .12em; text-transform: uppercase; text-decoration: none;
}
.video-strip .yt-note { position: absolute; left: 8px; right: 8px; bottom: -6px; }

/* =========================================================
   首页首屏「海报化」：占满一屏 + 更大标题 + 右图可播
   （放在最后，覆盖前面 .hero 的基础值）
========================================================= */
.hero {
  min-height: max(680px, calc(100vh - 118px));
  min-height: max(680px, calc(100svh - 118px));
}
.hero-layout { grid-template-columns: 1.1fr .9fr; padding: 54px 0 44px; gap: 54px; }
.hero h1 { font-size: clamp(48px, 5.4vw, 78px); }
.hero-desc { font-size: 16.5px; }
.hero-visual .media { box-shadow: 0 30px 70px rgba(0, 0, 0, .34); }

@media (max-width: 1000px) {
  .hero { min-height: auto; padding: 70px 0 46px; }
  .hero h1 { font-size: clamp(40px, 7.6vw, 62px); }
}
@media (max-width: 640px) {
  .hero h1 { font-size: clamp(34px, 9.4vw, 46px); }
}

/* =========================================================
   首页四入口大卡（检索门户）
========================================================= */
.hub-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.hub-card {
  display: flex; flex-direction: column; background: var(--c-white);
  border: 1px solid var(--c-line2); text-decoration: none; transition: .2s;
}
.hub-card:hover {
  border-color: var(--c-accent); transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(16, 52, 78, .12);
}
.hub-media { position: relative; display: block; aspect-ratio: 4 / 3; background: var(--c-bg2); overflow: hidden; }
.hub-media img { width: 100%; height: 100%; object-fit: contain; }
.hub-media::after { content: ''; position: absolute; inset: 0; box-shadow: inset 0 0 0 1px rgba(16, 52, 78, .06); }
.hub-num {
  position: absolute; left: 0; top: 0; z-index: 2; padding: 7px 9px;
  background: var(--c-accent); color: var(--c-accent-ink);
  font: 800 8.4px/1 var(--font-head); letter-spacing: .12em;
}
.hub-body { display: flex; flex-direction: column; gap: 9px; padding: 18px 16px 18px; height: 100%; }
.hub-kicker { font: 800 8px/1 var(--font-head); letter-spacing: .16em; color: var(--c-accent); }
.hub-body b { font: 800 16.5px/1.3 var(--font-head); letter-spacing: -.015em; color: var(--c-ink); }
.hub-x { color: var(--c-t1); font-size: 11.5px; line-height: 1.65; }
.hub-samples {
  font: 800 7.4px/1.7 var(--font-head); letter-spacing: .1em;
  color: var(--c-t3); text-transform: uppercase; margin-top: 2px;
}
.hub-go {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  margin-top: auto; padding-top: 13px; border-top: 1px solid var(--c-line2);
  font: 800 9px/1 var(--font-head); letter-spacing: .14em; color: var(--c-accent);
}
.hub-card:hover .hub-go .arrow { transform: translateX(4px); }
.hub-go .arrow { transition: .2s; }

@media (max-width: 1100px) { .hub-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .hub-grid { grid-template-columns: 1fr; } }

/* =========================================================
   首页四个独立大区块（标题区跨栏 + 下方横排图）
========================================================= */
.path-head {
  display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 22px 30px;
  padding-bottom: 22px; border-bottom: 1px solid var(--c-line); margin-bottom: 26px;
}
.path-head-main { max-width: 860px; }
.path-h {
  font-size: clamp(26px, 3.1vw, 42px); line-height: 1.06; letter-spacing: -.042em;
  font-weight: 780; margin: 11px 0 12px; color: var(--c-ink);
}
.path-lead { color: var(--c-t1); font-size: 14px; line-height: 1.8; margin: 0 0 18px; max-width: 700px; }
.path-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; }
.path-list-row { display: flex; flex-wrap: wrap; gap: 10px 26px; }
.path-list li {
  position: relative; padding-left: 17px;
  font: 800 9.6px/1.5 var(--font-head); letter-spacing: .1em;
  color: var(--c-ink); text-transform: uppercase;
}
.path-list li::before {
  content: ''; position: absolute; left: 0; top: 5px; width: 8px; height: 8px; background: var(--c-accent);
}
.path-more {
  display: inline-flex; align-items: center; gap: 10px; white-space: nowrap;
  padding-bottom: 6px; border-bottom: 2px solid var(--c-accent);
  font: 800 10.5px/1 var(--font-head); letter-spacing: .14em; text-transform: uppercase;
  color: var(--c-ink); text-decoration: none; transition: .18s;
}
.path-more:hover { color: var(--c-accent); }
.path-more:hover .arrow { transform: translateX(4px); }
.path-more .arrow { transition: .18s; color: var(--c-accent); }

/* 该维度的实物缩略图：一排 4 个 */
.path-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.thumb {
  position: relative; display: block; text-decoration: none;
  background: var(--c-white); border: 1px solid var(--c-line2);
  padding: 10px 10px 12px; transition: .18s;
}
.thumb:hover { border-color: var(--c-accent); box-shadow: 0 14px 30px rgba(16, 52, 78, .1); }
.thumb img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: contain; background: var(--c-bg2); }
.thumb-obj img { aspect-ratio: 3 / 3.4; }
.thumb-no {
  position: absolute; left: 10px; top: 10px; z-index: 2; padding: 4px 6px;
  background: var(--c-accent); color: var(--c-accent-ink);
  font: 800 7.6px/1 var(--font-head); letter-spacing: .1em;
}
.thumb b {
  display: block; margin-top: 10px;
  font: 800 9.4px/1.35 var(--font-head); letter-spacing: .08em;
  color: var(--c-ink); text-transform: uppercase;
}
.thumb small { display: block; margin-top: 4px; color: var(--c-t2); font: 700 9px/1 var(--font); }
.thumb-play {
  position: absolute; left: 50%; top: 42%; z-index: 2; transform: translate(-50%, -50%);
  width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%;
  background: rgba(13, 43, 65, .82); color: #fff; transition: .18s;
}
.thumb-play svg { width: 16px; height: 16px; fill: currentColor; margin-left: 2px; }
.thumb-v:hover .thumb-play { background: var(--c-accent); color: var(--c-accent-ink); }

@media (max-width: 1000px) {
  .path-thumbs { grid-template-columns: repeat(2, 1fr); }
  .path-head { grid-template-columns: 1fr; align-items: start; }
}
@media (max-width: 560px) {
  .path-thumbs { grid-template-columns: 1fr; }
}

/* 瓶子 / 液体：数量多、图小，一排 5 个 */
.path-thumbs.is-obj, .path-thumbs.is-liq { grid-template-columns: repeat(5, 1fr); gap: 12px; }
.path-thumbs.is-obj .thumb, .path-thumbs.is-liq .thumb { padding: 7px 7px 9px; }
.path-thumbs.is-obj .thumb img { aspect-ratio: 4 / 5; }
.path-thumbs.is-liq .thumb img { aspect-ratio: 4 / 3; }
.path-thumbs.is-obj .thumb b, .path-thumbs.is-liq .thumb b { font-size: 8.2px; letter-spacing: .06em; margin-top: 7px; }
.path-thumbs.is-obj .thumb-no, .path-thumbs.is-liq .thumb-no { left: 7px; top: 7px; padding: 3px 5px; font-size: 7px; }

/* 尚无实拍时的占位框：写明该放什么 */
.thumb-slot { background: var(--c-bg2); border-style: dashed; border-color: var(--c-t3); }
.thumb-slot:hover { border-style: solid; background: var(--c-white); }
.thumb-slot .slot-ph {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  aspect-ratio: 4 / 3; text-align: center; padding: 8px;
}
.path-thumbs.is-obj .thumb-slot .slot-ph { aspect-ratio: 4 / 5; }
.thumb-slot .slot-ph b {
  font: 800 8.6px/1.3 var(--font-head); letter-spacing: .1em;
  color: var(--c-t1); text-transform: uppercase; margin: 0;
}
.thumb-slot .slot-ph small { color: var(--c-t3); font: 700 9px/1.3 var(--font); }
.thumb-slot > b { color: var(--c-ink); }
@media (max-width: 1000px) {
  .path-thumbs.is-obj, .path-thumbs.is-liq { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 560px) {
  .path-thumbs.is-obj, .path-thumbs.is-liq { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 旧的左右分栏（保留，未使用） ---------- */
.path-split { display: grid; grid-template-columns: 1fr 1.06fr; gap: 58px; align-items: center; }
.path-split.is-flip .path-text { order: 2; }
.path-split.is-flip .path-media { order: 1; }
.path-h {
  font-size: clamp(30px, 3.5vw, 47px); line-height: 1.05; letter-spacing: -.045em;
  font-weight: 780; margin: 14px 0 18px; color: var(--c-ink);
}
.path-lead { color: var(--c-t1); font-size: 14.5px; line-height: 1.85; margin: 0 0 24px; max-width: 500px; }
.path-list { list-style: none; margin: 0 0 30px; padding: 0; display: grid; gap: 11px; }
.path-list li {
  position: relative; padding-left: 20px;
  font: 800 9.8px/1.5 var(--font-head); letter-spacing: .1em;
  color: var(--c-ink); text-transform: uppercase;
}
.path-list li::before {
  content: ''; position: absolute; left: 0; top: 5px; width: 9px; height: 9px; background: var(--c-accent);
}
.path-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.path-more {
  display: inline-flex; align-items: center; gap: 10px;
  padding-bottom: 6px; border-bottom: 2px solid var(--c-accent);
  font: 800 10.5px/1 var(--font-head); letter-spacing: .14em; text-transform: uppercase;
  color: var(--c-ink); text-decoration: none; transition: .18s;
}
.path-more:hover { color: var(--c-accent); }
.path-more:hover .arrow { transform: translateX(4px); }
.path-more .arrow { transition: .18s; color: var(--c-accent); }

/* 该维度的实物缩略图（视频缩略图 / 设备图 / 真瓶子 / 液体照片） */
.thumb {
  position: relative; display: block; text-decoration: none;
  background: var(--c-white); border: 1px solid var(--c-line2);
  padding: 10px 10px 12px; transition: .18s;
}
.thumb:hover { border-color: var(--c-accent); box-shadow: 0 14px 30px rgba(16, 52, 78, .1); }
.thumb img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: contain; background: var(--c-bg2); }
.thumb-obj img { aspect-ratio: 3 / 3.6; }
.thumb-no {
  position: absolute; left: 10px; top: 10px; z-index: 2; padding: 4px 6px;
  background: var(--c-accent); color: var(--c-accent-ink);
  font: 800 7.6px/1 var(--font-head); letter-spacing: .1em;
}
.thumb b {
  display: block; margin-top: 10px;
  font: 800 9.4px/1.35 var(--font-head); letter-spacing: .08em;
  color: var(--c-ink); text-transform: uppercase;
}
.thumb small { display: block; margin-top: 4px; color: var(--c-t2); font: 700 9px/1 var(--font); }
.thumb-play {
  position: absolute; left: 50%; top: 42%; z-index: 2; transform: translate(-50%, -50%);
  width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%;
  background: rgba(13, 43, 65, .82); color: #fff; transition: .18s;
}
.thumb-play svg { width: 16px; height: 16px; fill: currentColor; margin-left: 2px; }
.thumb-v:hover .thumb-play { background: var(--c-accent); color: var(--c-accent-ink); }

.path-media .video-slot {
  display: block; position: relative; aspect-ratio: 16 / 11;
  background: var(--c-bg2); border: 1px solid var(--c-line2); overflow: hidden;
}
.path-media .video-slot img.poster { width: 100%; height: 100%; object-fit: contain; }
.path-fig {
  position: relative; aspect-ratio: 16 / 11; background: var(--c-bg2);
  border: 1px solid var(--c-line2); overflow: hidden;
}
.path-fig img { width: 100%; height: 100%; object-fit: contain; }
.path-fig .path-tag {
  position: absolute; left: 0; bottom: 0; z-index: 2; padding: 7px 10px;
  background: var(--c-dark); color: #fff;
  font: 800 8.4px/1 var(--font-head); letter-spacing: .14em;
}

@media (max-width: 980px) {
  .path-split { grid-template-columns: 1fr; gap: 30px; }
  .path-split.is-flip .path-text { order: 1; }
  .path-split.is-flip .path-media { order: 2; }
  .path-h { font-size: clamp(26px, 6.4vw, 36px); }
  .path-media .video-slot, .path-fig { aspect-ratio: 4 / 3; }
}

@media (max-width: 1100px) {
  .liq-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .liq-grid { grid-template-columns: 1fr; }
  .seg-hint { display: none; }
  .seg { flex: 1 1 auto; text-align: center; }
}