/* ==========================================================================
   巨鑫绳网 · 「经纬 WEAVE」设计系统
   视觉方向：墨绿 × 炭黑 × 铜金 —— 以织造经纬线为核心母题
   动效原则：仅 transform/opacity，IntersectionObserver 驱动，尊重系统减弱动效
   ========================================================================== */

:root {
  /* 色彩 */
  --ink-950: #0a100e;          /* 近黑炭底 */
  --ink-900: #0e1713;          /* 炭黑 */
  --pine-900: #0f2b21;         /* 深墨绿 */
  --pine-700: #17453a;         /* 墨绿 */
  --pine-100: #dfe9e2;         /* 浅雾绿 */
  --brass: #c9a15a;            /* 铜金 */
  --brass-deep: #a8823f;
  --paper: #f6f4ef;            /* 暖纸白 */
  --paper-dim: #edeae1;
  --text: #1d2723;
  --muted: #5f6d66;
  --line: #dcd8cc;
  --line-dark: rgba(201, 161, 90, 0.22);

  /* 几何 */
  --radius: 4px;
  --radius-lg: 8px;
  --shadow: 0 18px 50px rgba(10, 16, 14, 0.14);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--paper);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, canvas { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
::selection { background: var(--brass); color: var(--ink-950); }

.container { width: min(1180px, 92%); margin: 0 auto; }
.container-narrow { width: min(840px, 92%); margin: 0 auto; }
.muted { color: var(--muted); }

/* ---------- 滚动进度条 ---------- */
.progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 100%;
  background: transparent; z-index: 300; pointer-events: none;
}
.progress-bar i {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--brass-deep), var(--brass));
  transition: width 0.08s linear;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px;
  font-weight: 600; font-size: 15px; letter-spacing: 0.05em;
  border: 1px solid transparent; cursor: pointer;
  transition: transform 0.25s var(--ease-out), background 0.25s, color 0.25s, border-color 0.25s, box-shadow 0.25s;
  position: relative; overflow: hidden;
}
.btn::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,0.25) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 0.6s var(--ease-out);
}
.btn:hover::after { transform: translateX(120%); }
.btn-primary { background: var(--brass); color: var(--ink-950); }
.btn-primary:hover { background: var(--brass-deep); transform: translateY(-2px); box-shadow: 0 10px 26px rgba(201,161,90,0.35); }
.btn-dark { background: var(--ink-900); color: var(--paper); }
.btn-dark:hover { background: var(--pine-900); transform: translateY(-2px); }
.btn-ghost { border-color: rgba(246,244,239,0.45); color: var(--paper); background: transparent; }
.btn-ghost:hover { border-color: var(--brass); color: var(--brass); transform: translateY(-2px); }
.btn-lg { padding: 16px 38px; font-size: 16px; }
.btn-block { width: 100%; }

/* ---------- 顶栏 ---------- */
.topbar { background: var(--ink-950); color: rgba(246,244,239,0.65); font-size: 13px; padding: 8px 0; border-bottom: 1px solid rgba(201,161,90,0.15); }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.topbar-text { color: var(--brass); font-weight: 600; letter-spacing: 0.04em; }
.topbar-contact { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.topbar-contact a:hover { color: var(--brass); }
.divider { opacity: 0.35; }

/* ---------- 导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(14, 23, 19, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(201,161,90,0.14);
  transition: box-shadow 0.3s;
}
.header.scrolled { box-shadow: 0 10px 30px rgba(10,16,14,0.35); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }

/* logo */
.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 46px; height: 46px; flex: 0 0 46px;
  background: linear-gradient(145deg, var(--pine-700), var(--ink-950));
  color: var(--brass);
  font-weight: 800; font-size: 22px; line-height: 1;
  display: grid; place-items: center;
  border-radius: 6px;
  box-shadow: inset 0 0 0 1px rgba(201,161,90,0.4), 0 6px 16px rgba(10,16,14,0.35);
}
.logo-text { display: block; font-size: 20px; font-weight: 800; letter-spacing: 0.08em; color: var(--paper); line-height: 1.15; white-space: nowrap; }
.logo-text span { color: var(--brass); }
.logo-text small { display: block; font-size: 8.5px; font-weight: 600; letter-spacing: 0.24em; color: rgba(246,244,239,0.5); margin-top: 3px; white-space: nowrap; }
.logo-light .logo-text { color: var(--paper); }

.nav { display: flex; align-items: center; gap: 28px; }
.nav-link {
  font-weight: 500; font-size: 15px; color: rgba(246,244,239,0.82);
  padding: 6px 0; position: relative; transition: color 0.25s;
}
.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 100%;
  background: var(--brass); transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s var(--ease-out);
}
.nav-link:hover { color: var(--paper); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.nav-link.active { color: var(--brass); }
.nav-cta { margin-left: 6px; padding: 10px 22px; }

/* 语言切换按钮：位于导航与汉堡按钮之间 */
.lang-switch {
  margin-left: 4px;
  padding: 8px 14px;
  background: transparent;
  color: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
  white-space: nowrap;
}
.lang-switch:hover { background: var(--paper); color: var(--navy-900); border-color: var(--paper); }
.header.scrolled .lang-switch { color: var(--navy-900); border-color: rgba(11, 31, 58, 0.25); }
.header.scrolled .lang-switch:hover { background: var(--navy-900); color: var(--paper); }

.menu-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; z-index: 210; }
.menu-toggle span { width: 26px; height: 2px; background: var(--paper); border-radius: 2px; transition: 0.3s var(--ease-out); }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   首屏 · 交互绳网
   ========================================================================== */
.hero {
  position: relative; min-height: 92vh;
  display: flex; align-items: center;
  background:
    radial-gradient(1200px 600px at 78% 18%, rgba(23, 69, 58, 0.55), transparent 60%),
    linear-gradient(160deg, var(--ink-950) 0%, var(--ink-900) 55%, var(--pine-900) 130%);
  color: var(--paper);
  overflow: hidden;
}
/* 经纬线底纹 */
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(201,161,90,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,161,90,0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(900px 700px at 70% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(900px 700px at 70% 40%, #000 30%, transparent 75%);
}
#netCanvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 40px; align-items: center; padding: 100px 0 120px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 13px; font-weight: 700; letter-spacing: 0.28em;
  color: var(--brass); text-transform: uppercase; margin-bottom: 22px;
}
.eyebrow::before { content: ""; width: 36px; height: 1px; background: var(--brass); }

.hero h1 {
  font-size: clamp(34px, 5.2vw, 62px);
  line-height: 1.22; font-weight: 800; letter-spacing: 0.02em;
  margin-bottom: 24px;
}
.hero h1 em {
  font-style: normal; color: var(--brass); white-space: nowrap;
  background: linear-gradient(transparent 64%, rgba(201, 161, 90, 0.22) 64%);
}
.hero-sub { font-size: 17.5px; color: rgba(246,244,239,0.72); max-width: 560px; margin-bottom: 38px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }

.hero-stats { display: grid; grid-template-columns: repeat(4, auto); gap: 38px; border-top: 1px solid rgba(201,161,90,0.2); padding-top: 30px; }
.hero-stats strong { display: block; font-size: 34px; font-weight: 800; color: var(--brass); line-height: 1.1; font-variant-numeric: tabular-nums; }
.hero-stats strong i { font-style: normal; font-size: 16px; margin-left: 2px; color: rgba(246,244,239,0.55); }
.hero-stats span { font-size: 13px; color: rgba(246,244,239,0.6); letter-spacing: 0.06em; }

.hero-side { display: flex; flex-direction: column; gap: 14px; }
.hero-photo {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: 0 30px 70px rgba(0,0,0,0.45);
  border: 1px solid rgba(201,161,90,0.25);
}
.hero-photo img { width: 100%; height: 360px; object-fit: cover; transform: scale(1.05); transition: transform 6s var(--ease-out); }
.hero-photo:hover img { transform: scale(1.12); }
.hero-photo figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  background: linear-gradient(transparent, rgba(10,16,14,0.9));
  padding: 40px 18px 14px; font-size: 13px; color: rgba(246,244,239,0.85);
  letter-spacing: 0.08em;
}

.hero-caps { border-top: 1px solid rgba(201,161,90,0.22); }
.hero-caps li {
  display: flex; gap: 14px; align-items: baseline;
  padding: 13px 0; font-size: 14px; color: rgba(246,244,239,0.7);
  border-bottom: 1px solid rgba(201,161,90,0.14);
}
.hero-caps b { color: var(--brass); font-size: 11.5px; letter-spacing: 0.18em; font-weight: 700; flex: 0 0 auto; }

.scroll-hint {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 11px; letter-spacing: 0.3em; color: rgba(246,244,239,0.45); z-index: 2;
}
.scroll-hint::after {
  content: ""; width: 1px; height: 44px;
  background: linear-gradient(var(--brass), transparent);
  animation: drip 1.8s var(--ease-out) infinite;
}
@keyframes drip {
  0% { transform: scaleY(0); transform-origin: top; }
  55% { transform: scaleY(1); transform-origin: top; }
  56% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- 跑马灯 ---------- */
.marquee { background: var(--brass); overflow: hidden; padding: 13px 0; }
.marquee-track { display: flex; gap: 0; width: max-content; animation: marquee 26s linear infinite; }
.marquee span { font-size: 14px; font-weight: 700; letter-spacing: 0.12em; color: var(--ink-950); padding: 0 26px; white-space: nowrap; display: flex; align-items: center; gap: 26px; }
.marquee span::after { content: "◆"; font-size: 8px; opacity: 0.55; }
@keyframes marquee { to { transform: translateX(-50%); } }
.marquee:hover .marquee-track { animation-play-state: paused; }

/* ==========================================================================
   章节通用
   ========================================================================== */
.section { padding: 110px 0; position: relative; }
.section-alt { background: var(--paper-dim); }
.section-dark { background: var(--ink-900); color: var(--paper); }
.section-dark::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(201,161,90,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,161,90,0.045) 1px, transparent 1px);
  background-size: 72px 72px;
}

.section-head { display: grid; grid-template-columns: auto 1fr; gap: 26px; align-items: start; max-width: 900px; margin-bottom: 60px; }
.sec-no {
  font-size: 52px; font-weight: 800; line-height: 1;
  color: transparent; -webkit-text-stroke: 1.5px var(--brass);
  font-variant-numeric: tabular-nums; padding-top: 6px;
}
.section-head h2 { font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; line-height: 1.3; letter-spacing: 0.02em; margin-bottom: 12px; }
.section-head p { color: var(--muted); font-size: 16.5px; max-width: 640px; }
.section-dark .section-head h2 { color: var(--paper); }
.section-dark .section-head p { color: rgba(246,244,239,0.65); }
.section-head .eyebrow { grid-column: 2; margin-bottom: 6px; }
.section-head .sec-no { grid-row: 1 / span 3; }

.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 入场动效 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }
.reveal-line { transform: scaleX(0); transform-origin: left; transition: transform 1s var(--ease-out); }
.reveal-line.in { transform: scaleX(1); }

/* ==========================================================================
   品牌叙事（01）
   ========================================================================== */
.brand-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.brand-copy h2 { font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; line-height: 1.35; margin-bottom: 22px; }
.brand-copy h2 em { font-style: normal; color: var(--pine-700); border-bottom: 4px solid var(--brass); }
.brand-copy p { color: var(--muted); margin-bottom: 16px; font-size: 16.5px; }
.brand-points { margin-top: 30px; display: flex; flex-direction: column; gap: 0; }
.brand-point { display: flex; gap: 18px; padding: 18px 0; border-top: 1px solid var(--line); }
.brand-point:last-child { border-bottom: 1px solid var(--line); }
.brand-point b { font-size: 13px; color: var(--brass-deep); font-variant-numeric: tabular-nums; padding-top: 3px; }
.brand-point div strong { display: block; font-size: 16px; color: var(--text); margin-bottom: 2px; }
.brand-point div span { font-size: 14px; color: var(--muted); }

.brand-visual { position: relative; }
.brand-visual .main-img {
  width: 100%; height: 520px; object-fit: cover; border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.brand-visual .float-img {
  position: absolute; right: -34px; bottom: -34px; width: 220px; height: 160px;
  object-fit: cover; border-radius: var(--radius); border: 6px solid var(--paper);
  box-shadow: var(--shadow);
}
.brand-visual::before {
  content: ""; position: absolute; inset: -20px -20px auto auto; width: 60%; height: 60%;
  border: 1px solid var(--line-dark); border-radius: var(--radius-lg); z-index: -1;
}
.weave-badge {
  position: absolute; left: -18px; top: 34px;
  background: var(--ink-900); color: var(--brass);
  font-size: 12px; font-weight: 700; letter-spacing: 0.2em;
  padding: 10px 18px; border-left: 3px solid var(--brass);
}

/* ==========================================================================
   重点产品 · 滚动叙事（02 封船网）
   ========================================================================== */
.story { display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; }
.story-media {
  position: relative; height: 480px; border-radius: var(--radius-lg); overflow: hidden;
  align-self: start; position: sticky; top: 110px;
  border: 1px solid rgba(201,161,90,0.25); box-shadow: 0 30px 80px rgba(0,0,0,0.5);
}
.story-media img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transform: scale(1.08); transition: opacity 0.8s var(--ease-out), transform 1.2s var(--ease-out);
}
.story-media img.active { opacity: 1; transform: scale(1); }
.story-media .story-tag {
  position: absolute; left: 18px; bottom: 18px; z-index: 2;
  background: rgba(10,16,14,0.82); color: var(--brass);
  font-size: 12.5px; font-weight: 700; letter-spacing: 0.16em;
  padding: 9px 16px; border-left: 3px solid var(--brass); backdrop-filter: blur(6px);
}
.story-steps { display: flex; flex-direction: column; }
.story-step {
  min-height: 62vh; display: flex; flex-direction: column; justify-content: center;
  padding: 30px 0 30px 34px; border-left: 1px solid rgba(201,161,90,0.25);
  position: relative; opacity: 0.38; transition: opacity 0.5s var(--ease-out);
}
.story-step::before {
  content: ""; position: absolute; left: -5px; top: 50%;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--ink-900); border: 2px solid rgba(201,161,90,0.4);
  transform: translateY(-50%); transition: 0.4s;
}
.story-step.active { opacity: 1; }
.story-step.active::before { background: var(--brass); border-color: var(--brass); box-shadow: 0 0 0 6px rgba(201,161,90,0.15); }
.story-step .step-no { font-size: 13px; font-weight: 700; letter-spacing: 0.3em; color: var(--brass); margin-bottom: 14px; }
.story-step h3 { font-size: clamp(22px, 2.6vw, 30px); font-weight: 800; margin-bottom: 14px; color: var(--paper); }
.story-step p { color: rgba(246,244,239,0.66); font-size: 15.5px; max-width: 460px; }
.story-step ul { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px; }
.story-step li {
  font-size: 12.5px; font-weight: 600; color: var(--brass);
  border: 1px solid rgba(201,161,90,0.35); padding: 5px 12px; border-radius: 999px;
}

/* ==========================================================================
   产品矩阵（03）
   ========================================================================== */
.tilt-wrap { perspective: 1100px; }
.product-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 0 28px 28px; display: flex; flex-direction: column;
  transition: box-shadow 0.35s var(--ease-out), border-color 0.35s;
  transform-style: preserve-3d; will-change: transform;
}
.product-card:hover { border-color: var(--brass); box-shadow: 0 30px 60px rgba(10,16,14,0.16); }
.card-media { margin: 0 -28px 24px; height: 220px; overflow: hidden; border-radius: var(--radius-lg) var(--radius-lg) 0 0; position: relative; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s var(--ease-out); }
.product-card:hover .card-media img { transform: scale(1.07); }
.card-no {
  position: absolute; top: 14px; left: 16px; z-index: 2;
  font-size: 12px; font-weight: 800; letter-spacing: 0.14em;
  color: var(--paper); background: rgba(10,16,14,0.72); backdrop-filter: blur(4px);
  padding: 5px 12px; border-radius: 999px;
}
.product-card h3 { font-size: 19px; margin-bottom: 10px; transform: translateZ(24px); }
.product-card p { color: var(--muted); font-size: 14.5px; flex: 1; transform: translateZ(14px); }
.card-link { margin-top: 18px; font-weight: 700; color: var(--brass-deep); font-size: 14px; display: inline-flex; align-items: center; gap: 6px; transition: gap 0.3s var(--ease-out); }
.product-card:hover .card-link { gap: 12px; }

/* ---------- 优势（05） ---------- */
.feature { background: #fff; border-radius: var(--radius-lg); padding: 30px 28px; border: 1px solid var(--line); position: relative; overflow: hidden; transition: transform 0.3s var(--ease-out), box-shadow 0.3s; }
.feature::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: linear-gradient(90deg, var(--brass), transparent); transform: scaleX(0); transform-origin: left; transition: transform 0.5s var(--ease-out); }
.feature:hover::before { transform: scaleX(1); }
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-num { font-size: 13px; font-weight: 800; color: var(--brass-deep); letter-spacing: 0.18em; margin-bottom: 14px; font-variant-numeric: tabular-nums; }
.feature h3 { font-size: 17.5px; margin-bottom: 10px; }
.feature p { font-size: 14.5px; color: var(--muted); }

/* ---------- 图库 ---------- */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.gallery figure { position: relative; overflow: hidden; border-radius: var(--radius-lg); }
.gallery img { width: 100%; height: 220px; object-fit: cover; transition: transform 0.7s var(--ease-out); }
.gallery figure:hover img { transform: scale(1.06); }
.gallery figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  background: linear-gradient(transparent, rgba(10,16,14,0.88));
  color: var(--paper); font-size: 13.5px; font-weight: 600; letter-spacing: 0.04em;
  padding: 30px 16px 14px;
  transform: translateY(8px); opacity: 0; transition: 0.4s var(--ease-out);
}
.gallery figure:hover figcaption { transform: none; opacity: 1; }
.gallery .span-2 { grid-column: span 2; }
.gallery .span-2 img { height: 220px; }

/* ---------- 流程 ---------- */
.process { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; }
.process::before { content: ""; position: absolute; top: 26px; left: 10%; right: 10%; height: 1px; background: rgba(201,161,90,0.3); }
.process-step { text-align: center; padding: 0 14px; position: relative; }
.process-step span {
  display: inline-grid; place-items: center;
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--ink-900); color: var(--brass);
  font-weight: 800; font-size: 17px; margin-bottom: 18px;
  border: 1px solid rgba(201,161,90,0.45);
  box-shadow: 0 0 0 8px var(--ink-900);
  transition: 0.35s var(--ease-out);
}
.process-step:hover span { background: var(--brass); color: var(--ink-950); transform: translateY(-4px); }
.process-step h3 { font-size: 16.5px; margin-bottom: 8px; color: var(--paper); }
.process-step p { font-size: 13.5px; color: rgba(246,244,239,0.6); }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: border-color 0.3s, box-shadow 0.3s; }
.faq-item[open] { border-color: var(--brass); box-shadow: var(--shadow); }
.faq-item summary {
  cursor: pointer; padding: 20px 24px;
  font-weight: 700; font-size: 16px;
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-size: 22px; color: var(--brass-deep); font-weight: 400;
  transition: transform 0.3s var(--ease-out); flex: 0 0 auto;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding: 0 24px 22px; color: var(--muted); font-size: 15px; }

/* ---------- CTA ---------- */
.cta { background: linear-gradient(120deg, var(--ink-950), var(--pine-900)); color: var(--paper); padding: 90px 0; position: relative; overflow: hidden; }
.cta::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(201,161,90,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,161,90,0.06) 1px, transparent 1px);
  background-size: 56px 56px;
}
.cta-inner { display: flex; justify-content: space-between; align-items: center; gap: 30px; flex-wrap: wrap; position: relative; }
.cta h2 { font-size: clamp(24px, 3vw, 36px); font-weight: 800; margin-bottom: 10px; }
.cta p { color: rgba(246,244,239,0.7); font-size: 16.5px; }

/* ---------- 内页横幅 ---------- */
.page-banner {
  background:
    radial-gradient(800px 400px at 85% 0%, rgba(23,69,58,0.7), transparent 60%),
    var(--ink-950);
  color: var(--paper); padding: 72px 0;
  border-bottom: 1px solid rgba(201,161,90,0.25);
  position: relative; overflow: hidden;
}
.page-banner::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(201,161,90,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,161,90,0.05) 1px, transparent 1px);
  background-size: 56px 56px;
}
.page-banner h1 { font-size: clamp(30px, 4vw, 46px); font-weight: 800; letter-spacing: 0.04em; margin-bottom: 12px; position: relative; }
.page-banner p { color: rgba(246,244,239,0.68); max-width: 640px; font-size: 16.5px; position: relative; }
.page-banner .eyebrow { position: relative; }

/* ---------- 筛选 + 产品详情卡 ---------- */
.section-tight { padding: 64px 0 110px; }
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 44px; }
.filter-btn {
  padding: 10px 22px; border-radius: 999px;
  border: 1px solid var(--line); background: #fff;
  font-weight: 600; font-size: 14px; color: var(--muted);
  cursor: pointer; transition: 0.25s; font-family: var(--font);
}
.filter-btn:hover { border-color: var(--pine-700); color: var(--pine-700); }
.filter-btn.active { background: var(--ink-900); border-color: var(--ink-900); color: var(--brass); }

.product-detail-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 0 26px 26px; display: flex; flex-direction: column;
  transition: 0.35s var(--ease-out);
}
.product-detail-card:hover { box-shadow: var(--shadow); border-color: var(--brass); transform: translateY(-4px); }
.product-detail-card.hidden { display: none; }
.pd-media { margin: 0 -26px 20px; height: 210px; overflow: hidden; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.pd-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s; }
.product-detail-card:hover .pd-media img { transform: scale(1.05); }
.pd-badge {
  align-self: flex-start;
  background: var(--pine-100); color: var(--pine-900);
  font-size: 12px; font-weight: 700; letter-spacing: 0.1em;
  padding: 5px 14px; border-radius: 999px; margin-bottom: 14px; border: 1px solid rgba(23,69,58,0.15);
}
.product-detail-card h3 { font-size: 19px; margin-bottom: 10px; }
.pd-desc { font-size: 14.5px; color: var(--muted); margin-bottom: 18px; }
.spec-table { width: 100%; border-collapse: collapse; margin-bottom: 22px; font-size: 14px; flex: 1; }
.spec-table td { padding: 9px 10px; border-bottom: 1px solid var(--line); }
.spec-table tr:last-child td { border-bottom: 0; }
.spec-table td:first-child { color: var(--muted); font-weight: 600; width: 40%; }
.spec-table td:last-child { color: var(--text); }
.product-detail-card .btn { margin-top: auto; }

.empty-state { text-align: center; padding: 60px 0; color: var(--muted); }

/* ---------- 关于页 ---------- */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 60px; align-items: center; }
.about-copy h2 { font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; line-height: 1.35; margin-bottom: 22px; }
.about-copy p { color: var(--muted); margin-bottom: 16px; font-size: 16.5px; }
.about-copy .eyebrow { color: var(--brass-deep); }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px 22px; text-align: center; transition: 0.3s var(--ease-out); }
.stat:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--brass); }
.stat strong { display: block; font-size: 30px; font-weight: 800; color: var(--pine-700); margin-bottom: 6px; }
.stat span { font-size: 13.5px; color: var(--muted); }

.band { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 44px; }
.band img { width: 100%; height: 280px; object-fit: cover; border-radius: var(--radius-lg); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 48px; align-items: start; }
.contact-form-wrap h2 { font-size: 28px; font-weight: 800; margin-bottom: 10px; }
.contact-form-wrap > p { margin-bottom: 26px; }

.contact-form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 36px; box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 7px; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%; padding: 12px 14px;
  border: 1px solid var(--line); border-radius: var(--radius);
  font-family: var(--font); font-size: 15px; color: var(--text);
  transition: border-color 0.25s, box-shadow 0.25s; background: var(--paper);
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: none; border-color: var(--pine-700); box-shadow: 0 0 0 3px rgba(23,69,58,0.12);
}
.form-field input.error, .form-field select.error, .form-field textarea.error { border-color: #b0402f; }
.form-status { margin-top: 14px; font-size: 14.5px; font-weight: 600; }
.form-status.success { color: #2a7a52; }
.form-status.fail { color: #b0402f; }
.form-status a { color: inherit; text-decoration: underline; }
.form-note { margin-top: 12px; font-size: 12.5px; color: var(--muted); }

.thanks-banner {
  background: #ecfdf5;
  border: 1px solid #86efac;
  border-left: 4px solid #15803d;
  color: #14532d;
  padding: 14px 18px;
  border-radius: 8px;
  margin-bottom: 22px;
  font-size: 15px;
  line-height: 1.6;
}
.thanks-banner strong { color: #15803d; font-size: 16px; }

.contact-info { display: flex; flex-direction: column; gap: 20px; }
.info-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; }
.info-card h3 { font-size: 16px; margin-bottom: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--brass); display: inline-block; }
.info-card ul { display: flex; flex-direction: column; gap: 10px; font-size: 14.5px; }
.info-card ul strong { display: inline-block; min-width: 110px; color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.06em; }
.info-card address { font-style: normal; font-size: 14.5px; line-height: 1.9; }
.info-card address em { color: var(--muted); font-size: 13px; }
.checklist li { padding-left: 26px; position: relative; color: var(--muted); }
.checklist li::before { content: "\2713"; position: absolute; left: 0; color: var(--brass-deep); font-weight: 800; }

.qr-card { text-align: center; }
.qr-card img { width: 190px; margin: 0 auto 14px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.qr-card p { font-size: 13.5px; color: var(--muted); }
.manager { display: flex; align-items: center; gap: 16px; margin-top: 6px; }
.manager img { width: 72px; height: 72px; object-fit: cover; border-radius: 50%; border: 2px solid var(--brass); }
.manager strong { display: block; font-size: 16px; }
.manager span { font-size: 13.5px; color: var(--muted); }

/* ---------- 页脚 ---------- */
.footer { background: var(--ink-950); color: rgba(246,244,239,0.66); padding-top: 70px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px; padding-bottom: 52px; }
.footer-col p { font-size: 14.5px; margin-top: 18px; }
.footer-col h4 { color: var(--paper); font-size: 14px; letter-spacing: 0.16em; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
.footer-col h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 28px; height: 2px; background: var(--brass); }
.footer-col ul { display: flex; flex-direction: column; gap: 11px; font-size: 14.5px; }
.footer-col ul a { transition: color 0.25s, padding-left 0.25s; }
.footer-col ul a:hover { color: var(--brass); padding-left: 6px; }
.footer-contact li { line-height: 1.7; }
.footer-bottom { border-top: 1px solid rgba(201,161,90,0.15); padding: 22px 0; font-size: 13px; }
.footer-bottom-inner { display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }

/* ==========================================================================
   兼容与降级
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(3, 1fr); gap: 30px 0; }
  .process::before { display: none; }
  .hero-inner { grid-template-columns: 1fr; padding: 80px 0 110px; }
  .hero-photo img { height: 280px; }
  .story { grid-template-columns: 1fr; }
  .story-media { position: relative; top: 0; height: 320px; }
  .story-step { min-height: 0; padding: 36px 0 36px 34px; }
  .brand-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .brand-visual .float-img { right: 10px; bottom: -24px; }
}

@media (max-width: 720px) {
  .nav {
    position: fixed; top: 0; right: -300px;
    width: 282px; height: 100vh;
    background: var(--ink-900); flex-direction: column;
    align-items: flex-start; padding: 100px 30px 30px;
    gap: 22px; box-shadow: -10px 0 40px rgba(0,0,0,0.4);
    transition: right 0.35s var(--ease-out);
  }
  .nav.open { right: 0; }
  .nav-cta { margin-left: 0; }
  .lang-switch { padding: 6px 12px; font-size: 12px; }
  .menu-toggle { display: flex; }
  .grid-3, .grid-4, .process, .form-row, .about-stats, .footer-grid { grid-template-columns: 1fr; }
  .gallery, .band { grid-template-columns: 1fr; }
  .gallery .span-2 { grid-column: span 1; }
  .gallery img, .gallery .span-2 img, .band img { height: 220px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .hero-stats strong { font-size: 28px; }
  .topbar-inner { justify-content: center; }
  .topbar-text { display: none; }
  .section { padding: 72px 0; }
  .section-head { grid-template-columns: 1fr; gap: 8px; }
  .sec-no { font-size: 40px; }
  .section-head .sec-no { grid-row: auto; }
  .brand-visual .main-img { height: 340px; }
  .brand-visual .float-img { width: 150px; height: 110px; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .marquee { display: none; }
}