/* ============================================================
   ROBIN 罗宾 —— 高尔夫球场割草机器人
   Design system (inspired by toro.com style: clean, editorial)
   ============================================================ */

:root {
  --brand-900: #143C3D;
  --brand-800: #1D5253;
  --brand-700: #276869;
  --brand-600: #388C8D;   /* primary - LOGO青绿 */
  --brand-500: #4FA3A4;
  --brand-100: #E4F0F0;
  --brand-50:  #F2F8F8;
  --gold:      #6FBFC0;   /* 亮青点缀 */
  --gold-soft: #EAF3F2;
  --ink:       #1A2E2E;   /* 深青黑 */
  --slate:     #4F6464;
  --line:      #DCE8E8;
  --bg-soft:   #F4F8F8;
  --white:     #FFFFFF;
  --radius:    14px;
  --radius-sm: 8px;
  --shadow:    0 10px 30px rgba(20, 60, 61, 0.08);
  --shadow-lg: 0 24px 60px rgba(20, 60, 61, 0.14);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-en: "Inter", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { width: min(1200px, 92%); margin: 0 auto; }

/* ---------- Typography ---------- */
h1, h2, h3 { line-height: 1.25; font-weight: 700; letter-spacing: 0.01em; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--brand-600);
  margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--gold); border-radius: 2px; }
.section { padding: 88px 0; }
.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); color: var(--brand-900); margin-bottom: 14px; }
.section-head p { color: var(--slate); font-size: 16px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head.center .eyebrow::after { content: ""; width: 26px; height: 2px; background: var(--gold); border-radius: 2px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 30px; border-radius: 999px;
  font-size: 15px; font-weight: 600; line-height: 1;
  transition: all 0.25s ease; border: 1px solid transparent;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: var(--brand-600); color: #fff; }
.btn-primary:hover { background: var(--brand-700); transform: translateY(-2px); box-shadow: 0 12px 24px rgba(56,140,141,0.3); }
.btn-outline { border-color: var(--brand-600); color: var(--brand-700); background: transparent; }
.btn-outline:hover { background: var(--brand-600); color: #fff; }
.btn-white { background: #fff; color: var(--brand-800); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 12px 24px rgba(0,0,0,0.15); }
.btn-ghost-white { border-color: rgba(255,255,255,0.6); color: #fff; }
.btn-ghost-white:hover { background: #fff; color: var(--brand-800); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-img { height: 42px; width: auto; display: block; }
.footer-brand-name { font-size: 22px; font-weight: 800; color: #fff; letter-spacing: 0.02em; transition: color 0.2s ease; }
.footer-brand-name:hover { color: var(--gold); }
.logo-mark {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--brand-600), var(--brand-900));
  display: grid; place-items: center; color: #fff;
}
.logo-name { font-weight: 800; font-size: 20px; color: var(--brand-900); letter-spacing: 0.02em; }
.logo-name span { color: var(--brand-600); }
.logo-sub { display: block; font-size: 10px; letter-spacing: 0.18em; color: var(--slate); text-transform: uppercase; font-weight: 600; }

.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--slate); position: relative; padding: 6px 0; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--brand-600); border-radius: 2px; transition: width 0.25s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--brand-700); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

/* ---------- 导航下拉（产品中心/联系购买） ---------- */
.nav-drop { position: relative; display: flex; align-items: center; }
.nav-drop > a {
  font-size: 15px; font-weight: 500; color: var(--slate); position: relative; padding: 6px 0;
}
.nav-drop > a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--brand-600); border-radius: 2px; transition: width 0.25s ease;
}
.nav-drop:hover > a, .nav-drop.open > a { color: var(--brand-700); }
.nav-drop:hover > a::after, .nav-drop.open > a::after { width: 100%; }
.nav-drop-caret { margin-left: 4px; color: var(--brand-600); flex: none; transition: transform 0.25s ease; }
.nav-drop.open .nav-drop-caret, .nav-drop:hover .nav-drop-caret { transform: rotate(180deg); }
.nav-drop-list {
  position: absolute; top: 100%; left: 0; z-index: 200;
  min-width: 200px; background: #fff; border: 1px solid var(--line);
  border-radius: 12px; box-shadow: var(--shadow-lg); padding: 6px;
  display: none;
}
.nav-drop.open .nav-drop-list, .nav-drop:hover .nav-drop-list { display: block; animation: dropIn 0.18s ease; }
.nav-drop-list li { list-style: none; }
.nav-drop-list a {
  display: block; padding: 9px 14px; border-radius: 8px; font-size: 13.5px; color: var(--ink);
  transition: background 0.15s ease, color 0.15s ease;
}
.nav-drop-list a::after { display: none; }
.nav-drop-list a:hover { background: var(--brand-50); color: var(--brand-700); }

.nav-right { display: flex; align-items: center; gap: 16px; }
.lang-drop { position: relative; }
.lang-drop-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px; border: 1px solid var(--line); border-radius: 999px;
  background: #fff; font-size: 13px; font-weight: 600; color: var(--brand-800);
  transition: border-color 0.2s ease, box-shadow 0.2s ease; white-space: nowrap;
}
.lang-drop-btn:hover { border-color: var(--brand-500); }
.lang-drop.open .lang-drop-btn { border-color: var(--brand-500); box-shadow: 0 0 0 3px rgba(79, 163, 164, 0.12); }
.lang-drop-btn .lang-caret { color: var(--brand-600); transition: transform 0.25s ease; flex: none; }
.lang-drop.open .lang-caret { transform: rotate(180deg); }
.lang-drop-list {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: 200;
  min-width: 190px; background: #fff; border: 1px solid var(--line);
  border-radius: 12px; box-shadow: var(--shadow-lg); padding: 6px;
  display: none; max-height: 60vh; overflow-y: auto;
}
.lang-drop.open .lang-drop-list { display: block; animation: dropIn 0.18s ease; }
@keyframes dropIn { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
.lang-drop-list li { list-style: none; }
.lang-drop-list button {
  width: 100%; text-align: left; padding: 9px 14px; border-radius: 8px;
  font-size: 13.5px; color: var(--ink);
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  transition: background 0.15s ease, color 0.15s ease;
}
.lang-drop-list button:hover { background: var(--brand-50); color: var(--brand-700); }
.lang-drop-list button.active { background: var(--brand-100); color: var(--brand-800); font-weight: 700; }
.lang-drop-list button.active::after { content: "✓"; color: var(--brand-600); font-weight: 800; }

@media (max-width: 1180px) {
  .nav-links { gap: 20px; }
}

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--brand-900); border-radius: 2px; transition: 0.25s; }

/* ---------- Hero ---------- */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(79,163,164,0.55), transparent 60%),
    linear-gradient(135deg, var(--brand-900) 0%, var(--brand-700) 55%, var(--brand-600) 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,0.12) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.5;
}
.hero-inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center;
  padding: 96px 0 104px;
}
.hero h1 { font-size: clamp(34px, 4.6vw, 56px); font-weight: 800; margin: 18px 0 22px; }
.hero h1 em { font-style: normal; color: #D8ECEC; }
.hero .lead { font-size: 17px; color: rgba(255,255,255,0.88); max-width: 520px; margin-bottom: 34px; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 52px; padding-top: 30px; flex-wrap: wrap; }
.hero-stats .stat b { display: block; font-size: 30px; font-weight: 800; }
.hero-stats .stat span { font-size: 13px; color: rgba(255,255,255,0.72); }

.hero-visual { position: relative; }
.mower-card {
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.16);
  border-radius: 20px; padding: 28px; backdrop-filter: blur(8px);
  box-shadow: var(--shadow-lg);
}
.mower-svg { width: 100%; }

.float-chip {
  position: absolute; background: #fff; color: var(--brand-900);
  border-radius: 12px; padding: 12px 16px; box-shadow: var(--shadow-lg);
  font-size: 13px; font-weight: 600; display: flex; align-items: center; gap: 8px;
}
.float-chip b { color: var(--brand-600); font-size: 16px; }
.chip-a { top: -18px; right: 8%; animation: float 4s ease-in-out infinite; }
.chip-b { bottom: -16px; left: -6%; animation: float 4.6s ease-in-out infinite reverse; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ---------- Hero carousel ---------- */
.hero-carousel { position: relative; overflow: hidden; }
.hero-track {
  display: flex;
  transition: transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
  touch-action: pan-y;
  cursor: grab;
}
.hero-track.dragging { transition: none; cursor: grabbing; }
.hero-slide { flex: 0 0 100%; min-width: 100%; }
.hero-slide-full { position: relative; }
.hero-bg { position: absolute; inset: 0; }
.hero-bg svg { width: 100%; height: 100%; }
/* 照片背景：左侧加深渐变遮罩，保证白色文字可读（由 content.js 加 .has-photo-bg） */
.has-photo-bg { position: relative; }
.has-photo-bg::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(100deg, rgba(16,52,61,0.78) 0%, rgba(16,52,61,0.42) 45%, rgba(16,52,61,0.12) 100%);
}
.hero-full-inner {
  position: relative; z-index: 2;
  padding: 108px 0;
}
.hero-full-inner .lead { max-width: 560px; text-shadow: 0 1px 14px rgba(0, 0, 0, 0.4); }
.hero-full-inner .eyebrow { color: #fff; text-shadow: 0 1px 10px rgba(0, 0, 0, 0.35); }
.hero-full-inner .eyebrow::before { background: var(--gold); }
.hero-full-inner .hero-title { text-shadow: 0 2px 18px rgba(0, 0, 0, 0.35); }
.hero-title {
  font-size: clamp(34px, 4.6vw, 56px); font-weight: 800; line-height: 1.25;
  margin: 18px 0 22px; color: #fff;
}
.hero-arrow {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 6;
  width: 48px; height: 48px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.12); border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff; display: grid; place-items: center;
  transition: background 0.25s ease, transform 0.25s ease;
  backdrop-filter: blur(4px);
}
.hero-arrow:hover { background: rgba(255, 255, 255, 0.3); transform: translateY(-50%) scale(1.08); }
.hero-arrow-prev { left: 18px; }
.hero-arrow-next { right: 18px; }
.hero-dots {
  position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%); z-index: 6;
  display: flex; gap: 8px;
}
.hero-dot {
  width: 10px; height: 10px; border-radius: 999px;
  background: rgba(255, 255, 255, 0.4); transition: all 0.3s ease;
}
.hero-dot.active { background: #fff; width: 28px; }
.hero-products { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.hp-card {
  background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 16px; padding: 16px 12px; text-align: center;
  backdrop-filter: blur(6px); transition: transform 0.3s ease, background 0.3s ease;
}
.hp-card:hover { transform: translateY(-6px); background: rgba(255, 255, 255, 0.14); }
.hp-card svg { width: 100%; }
.hp-photo { width: 100%; border-radius: 10px; }
.hp-card b { display: block; color: #fff; font-size: 14px; margin-top: 10px; }
.hero-techs { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.ht-card {
  background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 16px; padding: 24px 18px; text-align: center; color: #fff;
  backdrop-filter: blur(6px); transition: transform 0.3s ease, background 0.3s ease;
}
.ht-card:hover { transform: translateY(-6px); background: rgba(255, 255, 255, 0.14); }
.ht-card svg { width: 36px; height: 36px; margin: 0 auto 12px; color: #D8ECEC; }
.ht-card b { font-size: 15px; font-weight: 600; }
.hp-sol { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 18px; }
.hp-sol span {
  background: rgba(255, 255, 255, 0.14); border: 1px solid rgba(255, 255, 255, 0.25);
  color: #fff; font-size: 12.5px; font-weight: 600;
  padding: 6px 14px; border-radius: 999px;
}

/* ---------- Feature cards ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 26px; transition: all 0.3s ease;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.feature-icon {
  width: 56px; height: 56px; border-radius: 14px; display: grid; place-items: center;
  background: var(--brand-100); color: var(--brand-600); margin-bottom: 20px;
}
.feature-card h3 { font-size: 17px; color: var(--brand-900); margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--slate); }

/* ---------- Products ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
/* 图片画廊（RobinX三联旋刀剪草机） */
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.gallery-item {
  display: block; border-radius: 14px; overflow: hidden; border: 1px solid var(--line);
  background: #fff; box-shadow: var(--shadow); transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.gallery-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.gallery-item img { display: block; width: 100%; height: auto; aspect-ratio: 4/3; object-fit: cover; }
/* 产品规格表 */
.spec-table { margin-top: 34px; max-width: 100%; }
.spec-title { width: 100%; display: flex; align-items: center; gap: 10px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; font-size: 17px; font-weight: 700; color: var(--brand-900); cursor: pointer; text-align: left; }
.spec-title span { flex: 1; }
.spec-arrow { color: var(--brand-600); flex: none; transition: transform 0.25s ease; }
.spec-table.open .spec-arrow { transform: rotate(180deg); }
.spec-groups-wrap { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.spec-table.open .spec-groups-wrap { max-height: 2000px; }
.spec-groups { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; margin-top: 18px; }
.spec-group { background: var(--bg-soft); border-radius: 14px; padding: 18px 20px; }
.spec-group h5 { font-size: 14px; color: var(--brand-800); font-weight: 700; margin-bottom: 10px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.spec-group ul { list-style: none; }
.spec-group li { display: flex; justify-content: space-between; gap: 14px; padding: 7px 0; font-size: 13px; border-bottom: 1px dashed var(--line); }
.spec-group li:last-child { border-bottom: none; }
.spec-group li span { color: var(--slate); flex: none; }
.spec-group li b { color: var(--ink); font-weight: 600; text-align: right; }
.spec-sub { font-size: 13px; font-weight: 700; color: var(--brand-800); margin: 14px 0 6px; padding-top: 10px; border-top: 1px dashed var(--line); }
.product-card {
  background: #fff; border: 1px solid var(--line); border-radius: 18px; overflow: hidden;
  transition: all 0.3s ease; display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.product-media {
  aspect-ratio: 16/10; display: grid; place-items: center; position: relative; overflow: hidden;
}
.product-photo { width: 100%; height: 100%; object-fit: cover; }
.product-media svg { width: 72%; transition: transform 0.4s ease; }
.product-card:hover .product-media svg { transform: scale(1.06); }
.product-tag {
  position: absolute; top: 16px; left: 16px; background: var(--gold); color: #1E4A3C;
  font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px; letter-spacing: 0.04em;
}
.product-body { padding: 26px; display: flex; flex-direction: column; flex: 1; }
.product-body h3 { font-size: 19px; color: var(--brand-900); margin-bottom: 4px; }
.product-en { font-size: 13px; color: var(--brand-600); font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 12px; }
.product-body p { font-size: 14px; color: var(--slate); margin-bottom: 16px; flex: 1; }
.spec-list { border-top: 1px dashed var(--line); padding-top: 14px; display: grid; grid-template-columns: 1fr 1fr; gap: 8px 14px; }
.spec-list li { font-size: 13px; color: var(--slate); display: flex; gap: 8px; align-items: baseline; }
.spec-list li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--brand-500); flex: none; transform: translateY(-1px); }
.spec-list b { color: var(--ink); font-weight: 600; }

/* ---------- Solutions / bands ---------- */
.band { border-radius: 22px; padding: 46px; color: #fff; position: relative; overflow: hidden; }
.band-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.solution-card {
  border-radius: 18px; padding: 40px 36px; position: relative; overflow: hidden; color: #fff;
  transition: transform 0.3s ease; box-shadow: var(--shadow);
}
.solution-card:hover { transform: translateY(-5px); }
.solution-card .s-num { font-size: 44px; font-weight: 800; opacity: 0.25; position: absolute; top: 18px; right: 26px; }
.solution-card h3 { font-size: 22px; margin: 16px 0 10px; }
.solution-card p { font-size: 14px; color: rgba(255,255,255,0.85); }
.solution-card ul { margin-top: 14px; display: grid; gap: 6px; }
.solution-card ul li { font-size: 13px; color: rgba(255,255,255,0.9); display: flex; gap: 8px; align-items: baseline; }
.solution-card ul li::before { content: "✓"; color: var(--gold); font-weight: 800; flex: none; }

/* ---------- Stats band ---------- */
.stats-band {
  background: linear-gradient(120deg, var(--brand-900), var(--brand-700));
  color: #fff; border-radius: 22px; padding: 56px 46px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center;
}
.stats-band .stat b { display: block; font-size: 40px; font-weight: 800; color: #D8ECEC; }
.stats-band .stat span { font-size: 14px; color: rgba(255,255,255,0.8); }

/* ---------- Steps ---------- */
.step-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step-card { position: relative; background: var(--bg-soft); border-radius: var(--radius); padding: 34px 26px; }
.step-card::before {
  counter-increment: step; content: "0" counter(step);
  font-size: 30px; font-weight: 800; color: var(--brand-500); display: block; margin-bottom: 14px;
}
.step-card h3 { font-size: 16px; color: var(--brand-900); margin-bottom: 8px; }
.step-card p { font-size: 13.5px; color: var(--slate); }

/* ---------- CTA ---------- */
.cta-band {
  background:
    radial-gradient(800px 400px at 90% 0%, rgba(111,191,192,0.25), transparent 60%),
    linear-gradient(120deg, var(--brand-900), var(--brand-600));
  border-radius: 22px; padding: 64px 48px; color: #fff; text-align: center;
}
.cta-band h2 { font-size: clamp(24px, 3.2vw, 36px); margin-bottom: 12px; }
.cta-band p { color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 30px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--brand-900); color: rgba(255,255,255,0.75); margin-top: 88px; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 44px;
  padding: 64px 0 48px;
}
.footer-brand p { font-size: 14px; margin-top: 16px; max-width: 300px; color: rgba(255,255,255,0.65); }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 18px; font-weight: 700; }
.footer-col li { margin-bottom: 10px; font-size: 14px; }
.footer-col a:hover { color: #D8ECEC; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; }
.footer-contact svg { width: 16px; height: 16px; flex: none; margin-top: 4px; color: var(--brand-500); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12); padding: 22px 0;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 13px; color: rgba(255,255,255,0.5);
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  background:
    radial-gradient(900px 400px at 85% -20%, rgba(79,163,164,0.5), transparent 60%),
    linear-gradient(135deg, var(--brand-900), var(--brand-700));
  color: #fff; padding: 72px 0 80px; position: relative; overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,0.12) 1px, transparent 1px);
  background-size: 22px 22px; opacity: 0.4;
}
.page-hero h1 { font-size: clamp(28px, 3.6vw, 42px); margin: 12px 0 12px; position: relative; z-index: 2; }
.page-hero p { color: rgba(255,255,255,0.85); max-width: 640px; position: relative; z-index: 2; }

/* ---------- About ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split-visual { background: var(--brand-100); border-radius: 20px; padding: 44px; display: grid; place-items: center; }
.split h2 { font-size: clamp(24px, 3vw, 34px); color: var(--brand-900); margin-bottom: 16px; }
.split p { color: var(--slate); margin-bottom: 16px; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-card { background: var(--bg-soft); border-radius: var(--radius); padding: 30px; }
.value-card h3 { color: var(--brand-900); font-size: 17px; margin-bottom: 8px; }
.value-card p { font-size: 14px; color: var(--slate); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 44px; align-items: start; }
.contact-info { background: var(--bg-soft); border-radius: var(--radius); padding: 36px; }
.contact-info li { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); align-items: flex-start; }
.contact-info li:last-child { border-bottom: none; }
.contact-info svg { width: 20px; height: 20px; color: var(--brand-600); flex: none; margin-top: 3px; }
.contact-info b { display: block; font-size: 14px; color: var(--brand-900); margin-bottom: 2px; }
.contact-info span { font-size: 14px; color: var(--slate); }

/* ---------- 联系方式：办公室卡片（中国/日本/美国） ---------- */
.office-list { display: flex; flex-direction: column; gap: 22px; }
.office-card {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 6px 26px; box-shadow: var(--shadow); overflow: hidden;
}
.office-toggle {
  width: 100%; display: flex; align-items: center; gap: 10px;
  background: none; border: none; cursor: pointer;
  font-size: 16px; font-weight: 700; color: var(--brand-900);
  padding: 18px 0; text-align: left;
}
.office-toggle > svg:first-child { width: 20px; height: 20px; color: var(--brand-600); flex: none; }
.office-toggle span { flex: 1; }
.office-arrow { color: var(--brand-600); flex: none; transition: transform 0.25s ease; }
.office-card.open .office-arrow { transform: rotate(180deg); }
.office-body { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.office-card.open .office-body { max-height: 800px; }
.office-card ul { list-style: none; }
.office-card li { display: flex; gap: 12px; padding: 12px 0; align-items: flex-start; }
.office-card li svg { width: 18px; height: 18px; color: var(--brand-500); flex: none; margin-top: 2px; }
.office-card li b { display: block; font-size: 13px; color: var(--brand-800); margin-bottom: 2px; }
.office-card li span { font-size: 14px; color: var(--slate); }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--brand-900); margin-bottom: 7px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 14px; font-family: inherit; color: var(--ink); background: var(--white); transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--brand-500); box-shadow: 0 0 0 3px rgba(79,163,164,0.12);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-note { font-size: 12.5px; color: var(--slate); margin-top: 12px; }

/* ---------- Timeline (support page) ---------- */
.timeline { position: relative; padding-left: 30px; max-width: 760px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.tl-item { position: relative; padding: 0 0 34px 10px; }
.tl-item::before { content: ""; position: absolute; left: -29px; top: 6px; width: 14px; height: 14px; border-radius: 50%; background: var(--brand-600); border: 3px solid var(--brand-100); }
.tl-item h3 { font-size: 17px; color: var(--brand-900); margin-bottom: 6px; }
.tl-item p { font-size: 14px; color: var(--slate); max-width: 560px; }

/* ---------- FAQ ---------- */
.faq-item { border: 1px solid var(--line); border-radius: var(--radius-sm); margin-bottom: 12px; overflow: hidden; }
.faq-q { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 18px 22px; font-size: 15px; font-weight: 600; color: var(--brand-900); text-align: left; }
.faq-q .faq-arrow { transition: transform 0.25s; flex: none; color: var(--brand-600); }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-a p { padding: 0 22px 20px; font-size: 14px; color: var(--slate); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.revealed { opacity: 1; transform: none; }

/* ---------- 锚点滚动偏移（避免被固定导航栏遮挡） ---------- */
.series-block,
#contact-form,
#productList,
#quote,
#dealer { scroll-margin-top: 88px; }

/* ---------- News ---------- */
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card {
  background: var(--white); border: 1px solid var(--line); border-radius: 18px;
  padding: 30px 28px; transition: all 0.3s ease; display: flex; flex-direction: column;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.news-date { font-size: 12.5px; color: var(--brand-600); font-weight: 600; letter-spacing: 0.05em; margin-bottom: 10px; }
.news-card h3 { font-size: 18px; color: var(--brand-900); margin-bottom: 10px; }
.news-card p { font-size: 14px; color: var(--slate); flex: 1; }

/* ---------- 场景系列卡片（首页轮播下方） ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.scene-card {
  border-radius: 22px; overflow: hidden; color: #fff; position: relative;
  display: flex; flex-direction: column; height: 100%;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.scene-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.scene-media {
  position: relative; aspect-ratio: 16/9; overflow: hidden;
  display: grid; place-items: center;
}
.scene-media svg { width: 62%; transition: transform 0.4s ease; }
.scene-card:hover .scene-media svg { transform: scale(1.06); }
.scene-media-overlay {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(180deg, rgba(0,0,0,0.30) 0%, rgba(0,0,0,0.05) 40%, rgba(0,0,0,0.12) 100%);
}
/* 场景卡轮播 */
.scene-slider { position: absolute; inset: 0; }
.scene-slide {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: 0; transition: opacity 0.8s ease;
}
.scene-slide.active { opacity: 1; }
.scene-dots {
  position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 8px; z-index: 3;
}
.scene-dot {
  width: 9px; height: 9px; border-radius: 999px; border: none; cursor: pointer;
  background: rgba(255,255,255,0.5); transition: all 0.25s ease; padding: 0;
}
.scene-dot:hover { background: rgba(255,255,255,0.8); }
.scene-dot.active { background: #fff; width: 22px; }
.scene-tag {
  position: absolute; top: 16px; left: 16px; background: rgba(255,255,255,0.9);
  color: #1E4A3C; font-size: 12px; font-weight: 700; padding: 4px 12px;
  border-radius: 999px; letter-spacing: 0.04em; z-index: 2;
}
.scene-body { padding: 30px 28px; background: #fff; color: var(--ink); flex: 1; display: flex; flex-direction: column; }
.scene-body h3 { font-size: 22px; color: var(--brand-900); margin-bottom: 12px; }
.scene-body p { font-size: 15px; color: var(--slate); margin-bottom: 20px; flex: 1; line-height: 1.7; }
.scene-body .btn { align-self: flex-start; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .step-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-band { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-inner { grid-template-columns: 1fr; padding: 64px 0; }
  .hero-visual { max-width: 520px; }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .hero-arrow { display: none; }
  .hero-dots { bottom: 12px; }
  .hero-full-inner { padding: 84px 0; }
  .hero-products { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .hp-card { padding: 10px 6px; }
  .hp-card b { font-size: 12px; margin-top: 6px; }
  .lang-drop-btn { padding: 7px 12px; font-size: 12.5px; }
  .lang-drop-list { min-width: 160px; }
  .nav-links {
    position: fixed; inset: 76px 0 auto 0; background: #fff; flex-direction: column;
    padding: 24px; gap: 18px; border-bottom: 1px solid var(--line);
    transform: translateY(-120%); transition: transform 0.3s ease; align-items: flex-start;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: flex; }
  /* 移动端导航下拉：静态向下展开 */
  .nav-drop { width: 100%; position: relative; }
  .nav-drop > a { width: 100%; display: block; }
  .nav-drop-list {
    position: static; min-width: 0; box-shadow: none; border: none;
    padding-left: 14px; display: none;
  }
  .nav-drop.open .nav-drop-list { display: block; animation: none; }
  .feature-grid, .product-grid, .step-grid, .band-grid, .split, .contact-grid, .news-grid, .scene-grid, .gallery-grid, .spec-groups { grid-template-columns: 1fr; }
  .stats-band { grid-template-columns: 1fr 1fr; padding: 40px 26px; }
  .form-row { grid-template-columns: 1fr; }
  .band { padding: 30px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-band { padding: 46px 26px; }
  .hero-stats { gap: 24px; }
}