:root {
  /* 三粒臻品宣传册配色：中国红 + 皇家蓝 + 臻金色 */
  --red: #c1121f;
  --red-deep: #9a0d18;
  --red-soft: #fce8e9;
  --blue: #1e4da1;
  --blue-deep: #153a7a;
  --blue-soft: #e8eef8;
  --gold: #d4a14f;
  --gold-soft: #f5e9d2;
  --navy: #1a2b4a;
  --navy-deep: #0f1a2e;
  --gray-bg: #f5f5f5;
  --gray-light: #f8f8f8;
  --white: #ffffff;
  --ink: #1a1a1a;
  --muted: #666666;
  --line: #e8e8e8;
  --shadow: 0 18px 50px -22px rgba(26,43,74,0.22);
  --shadow-red: 0 14px 40px -16px rgba(193,18,31,0.35);
  --radius: 18px;
  --radius-sm: 12px;
  --serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  --maxw: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--white);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.94);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--red) 0%, var(--red-deep) 100%);
  color: var(--gold-soft);
  display: grid; place-items: center;
  font-family: var(--serif);
  font-size: 18px; font-weight: 700;
  border: 2px solid var(--gold);
}
.brand .name { font-family: var(--serif); font-size: 20px; font-weight: 700; letter-spacing: 1px; color: var(--navy); }
.brand .name small { display: block; font-family: var(--sans); font-size: 11px; letter-spacing: 3px; color: var(--muted); font-weight: 500; }

.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 15px; color: var(--ink); position: relative; padding: 6px 0; transition: color .25s; font-weight: 500; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--red); transition: width .28s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--red); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-cta {
  background: var(--red); color: #fff; padding: 10px 22px; border-radius: 999px;
  font-size: 14px; transition: background .25s, transform .25s; font-weight: 500;
}
.nav-cta:hover { background: var(--red-deep); transform: translateY(-1px); }

.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.hamburger span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: .3s; }

/* ---------- Topbar ---------- */
.topbar {
  background: var(--navy);
  color: #d8e0ec;
  font-size: 13px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.topbar .container { display: flex; align-items: center; gap: 16px; min-height: 42px; padding: 7px 24px; }
.topbar .tb-left { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.topbar .tb-left span { color: #d8e0ec; display: inline-flex; align-items: center; gap: 6px; }
.topbar .tb-left i { color: var(--gold); font-style: normal; }
.topbar .tb-left b { color: #fff; font-weight: 600; }
@media (max-width: 720px) {
  .topbar .container { padding: 6px 18px; gap: 6px; }
  .topbar .tb-left { gap: 6px 14px; font-size: 12px; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 30px; border-radius: 999px; font-size: 15px; font-weight: 500;
  transition: all .25s ease; cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: var(--red); color: #fff; }
.btn-primary:hover { background: var(--red-deep); transform: translateY(-2px); box-shadow: var(--shadow-red); }
.btn-gold { background: var(--gold); color: #2a2310; }
.btn-gold:hover { background: #bd8a2c; transform: translateY(-2px); }
.btn-ghost { border-color: var(--red); color: var(--red); background: transparent; }
.btn-ghost:hover { background: var(--red); color: #fff; }
.btn-blue { background: var(--blue); color: #fff; }
.btn-blue:hover { background: var(--blue-deep); transform: translateY(-2px); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(1200px 560px at 78% -12%, rgba(212,161,79,.20), transparent 60%),
    linear-gradient(150deg, var(--navy-deep) 0%, var(--navy) 45%, var(--blue-deep) 100%);
  color: #fff;
  overflow: hidden;
  padding: 120px 0 110px;
}
.hero::before {
  content: ""; position: absolute; right: -120px; top: -120px; width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(193,18,31,.22), transparent 70%); border-radius: 50%;
}
.hero::after {
  content: ""; position: absolute; left: -80px; bottom: -80px; width: 380px; height: 380px;
  background: radial-gradient(circle, rgba(30,77,161,.20), transparent 70%); border-radius: 50%;
}
.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center; }
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  letter-spacing: 3px; font-size: 13px; color: var(--gold-soft);
  border: 1px solid rgba(212,161,79,.5); padding: 7px 18px; border-radius: 999px; margin-bottom: 26px;
}
.hero h1 {
  font-family: var(--serif); font-weight: 700; line-height: 1.22;
  font-size: clamp(34px, 5vw, 60px); margin-bottom: 18px; color: #fff;
}
.hero h1 .accent { color: var(--red); }
.hero h1 .gold { color: var(--gold); }
.hero .subtitle {
  font-family: var(--serif); font-size: clamp(18px, 2.4vw, 26px); color: var(--gold-soft);
  margin-bottom: 22px; letter-spacing: 1px;
}
.hero p.lead { font-size: clamp(16px, 2vw, 18px); max-width: 560px; color: #d8e0ec; margin-bottom: 38px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 46px; margin-top: 58px; }
.hero-stats .stat .num { font-family: var(--serif); font-size: 38px; font-weight: 700; color: var(--gold); }
.hero-stats .stat .label { font-size: 14px; color: #b9c5d8; letter-spacing: 1px; }
.hero-media {
  position: relative; border-radius: 24px; overflow: hidden;
  box-shadow: 0 30px 70px -20px rgba(0,0,0,.35);
  border: 1px solid rgba(255,255,255,.12);
}
.hero-media img { width: 100%; height: 100%; object-fit: cover; min-height: 380px; }

/* ---------- Section ---------- */
.section { padding: 96px 0; }
.section.alt { background: var(--gray-light); }
.section.alt2 { background: var(--navy); color: #fff; }
.section.alt2 .section-head h2, .section.alt2 .section-head .zh { color: #fff; }
.section.alt2 .section-head .en { color: var(--gold-soft); }
.section.alt2 .section-head p { color: #b9c5d8; }

.section-head { text-align: center; max-width: 760px; margin: 0 auto 60px; }
.section-head .tag {
  display: inline-block; color: var(--red); letter-spacing: 3px; font-size: 28px; font-weight: 700;
  text-transform: uppercase; margin-bottom: 10px;
}
.section-head .zh { font-family: var(--serif); font-size: clamp(28px, 3.6vw, 40px); color: var(--navy); margin-bottom: 6px; }
.section-head .en { font-family: var(--sans); font-size: 13px; letter-spacing: 2px; color: var(--blue); text-transform: uppercase; font-weight: 600; margin-bottom: 14px; }
.section-head p { color: var(--muted); font-size: 16px; }

/* Bilingual heading used inline */
.bilingual-head { margin-bottom: 26px; }
.bilingual-head .zh { font-family: var(--serif); font-size: clamp(24px, 3vw, 32px); color: var(--navy); margin-bottom: 6px; }
.bilingual-head .en { font-size: 13px; letter-spacing: 2px; color: var(--blue); text-transform: uppercase; font-weight: 600; }
.bilingual-head .bar { width: 48px; height: 4px; background: var(--red); margin-top: 14px; border-radius: 2px; }

/* ---------- Feature grid ---------- */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 24px; transition: transform .3s, box-shadow .3s;
}
.feature:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.feature .ico {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: var(--red-soft); color: var(--red); font-size: 22px; margin-bottom: 18px;
}
.feature h3 { font-size: 18px; margin-bottom: 8px; color: var(--navy); }
.feature p { font-size: 14.5px; color: var(--muted); }

/* ---------- Numbered cards ---------- */
.num-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.num-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px; display: flex; gap: 22px; transition: transform .3s, box-shadow .3s; position: relative; overflow: hidden;
}
.num-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.num-card::before {
  content: ""; position: absolute; right: -40px; top: -40px; width: 160px; height: 160px;
  background: radial-gradient(circle, rgba(193,18,31,.08), transparent 70%); border-radius: 50%;
}
.num-card .badge {
  flex: 0 0 56px; width: 56px; height: 56px; border-radius: 14px;
  background: var(--red); color: #fff; display: grid; place-items: center;
  font-family: var(--serif); font-size: 26px; font-weight: 700; position: relative;
}
.num-card.blue .badge { background: var(--blue); }
.num-card.gold .badge { background: var(--gold); color: #2a2310; }
.num-card .body { flex: 1; position: relative; }
.num-card .body h3 { font-size: 20px; color: var(--navy); margin-bottom: 8px; }
.num-card .body h3 .en { font-size: 12px; color: var(--red); margin-left: 8px; font-weight: 600; letter-spacing: 1px; }
.num-card .body p { font-size: 14.5px; color: var(--muted); }

/* ---------- Product cards ---------- */
.products { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.product {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0; display: flex; flex-direction: column; transition: transform .3s, box-shadow .3s; position: relative; overflow: hidden;
}
.product:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.product .pimg { height: 220px; background: var(--gray-light); display: grid; place-items: center; overflow: hidden; }
.product .pimg img { width: 100%; height: 100%; object-fit: cover; }
.product .pbody { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.product .pbody h3 { font-size: 22px; color: var(--navy); margin-bottom: 4px; }
.product .pbody .en { font-size: 12px; color: var(--blue); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 10px; font-weight: 600; }
.product .pbody .spec { font-size: 13px; color: var(--red); font-weight: 600; margin-bottom: 10px; }
.product .pbody .slogan { font-size: 15px; color: var(--ink); font-weight: 500; margin-bottom: 12px; }
.product .pbody p { font-size: 14.5px; color: var(--muted); flex: 1; }
.product .pbody .tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.product .pbody .tags span { font-size: 12px; background: var(--blue-soft); color: var(--blue-deep); padding: 5px 12px; border-radius: 999px; }
.product .pbody .pnote { font-size: 12px; color: var(--muted); margin-top: 14px; line-height: 1.5; }

/* Product overview cards (horizontal) */
.overview-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.overview-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: transform .3s, box-shadow .3s;
}
.overview-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.overview-card .thumb { height: 200px; background: var(--gray-light); overflow: hidden; }
.overview-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.overview-card .info { padding: 22px; }
.overview-card .info h4 { font-size: 18px; color: var(--navy); margin-bottom: 4px; }
.overview-card .info .en { font-size: 11px; color: var(--blue); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; }
.overview-card .info .claims { display: flex; flex-wrap: wrap; gap: 6px; }
.overview-card .info .claims span { font-size: 12px; background: var(--red-soft); color: var(--red-deep); padding: 4px 10px; border-radius: 999px; }

/* ---------- Two column ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.split .media {
  height: 420px; border-radius: var(--radius);
  background: linear-gradient(150deg, var(--blue) 0%, var(--blue-deep) 100%);
  position: relative; overflow: hidden; display: grid; place-items: center;
}
.split .media img { width: 100%; height: 100%; object-fit: cover; }
.split .media .quote { font-family: var(--serif); font-size: 26px; line-height: 1.6; max-width: 80%; text-align: center; color: #fff; position: relative; z-index: 2; }
.split h2 { font-family: var(--serif); font-size: clamp(26px, 3vw, 34px); color: var(--navy); margin-bottom: 18px; }
.split p { color: var(--muted); margin-bottom: 16px; }
.split ul { list-style: none; display: grid; gap: 12px; }
.split ul li { display: flex; gap: 12px; align-items: flex-start; color: var(--ink); }
.split ul li::before { content: "✦"; color: var(--red); flex: 0 0 auto; }

/* ---------- Value list ---------- */
.value-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 22px; }
.value-item {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 18px 20px; display: flex; gap: 12px; align-items: flex-start;
}
.value-item .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--red); margin-top: 10px; flex: 0 0 auto; }
.value-item h4 { font-size: 16px; color: var(--navy); margin-bottom: 4px; }
.value-item p { font-size: 13px; color: var(--muted); line-height: 1.6; }

/* ---------- Table ---------- */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
table.tbl { width: 100%; border-collapse: collapse; min-width: 620px; }
table.tbl th, table.tbl td { text-align: left; padding: 16px 20px; border-bottom: 1px solid var(--line); font-size: 15px; }
table.tbl th { background: var(--navy); color: var(--gold-soft); font-weight: 600; letter-spacing: 1px; }
table.tbl tr:last-child td { border-bottom: none; }
table.tbl tr:hover td { background: var(--gray-light); }
table.tbl td .cls { display: inline-block; background: var(--red-soft); color: var(--red-deep); font-weight: 700; padding: 2px 10px; border-radius: 6px; font-size: 13px; }

/* ---------- Trademark cards ---------- */
.trademark-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.tmark-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: transform .3s, box-shadow .3s; position: relative; overflow: hidden;
}
.tmark-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.tmark-card::before {
  content: ""; position: absolute; right: -36px; top: -36px; width: 130px; height: 130px;
  background: radial-gradient(circle, rgba(193,18,31,.12), transparent 70%); border-radius: 50%;
}
.tmark-card .head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; position: relative; }
.tmark-card .head .cls { background: var(--red-soft); color: var(--red-deep); font-weight: 700; padding: 4px 12px; border-radius: 8px; font-size: 13px; }
.tmark-card .head .reg-no { font-family: var(--serif); font-size: 15px; color: var(--blue); font-weight: 600; }
.tmark-card h3 { font-family: var(--serif); font-size: 18px; color: var(--navy); margin-bottom: 14px; position: relative; }
.tmark-card .meta { list-style: none; display: grid; gap: 8px; margin-bottom: 16px; position: relative; }
.tmark-card .meta li { display: flex; gap: 10px; font-size: 13px; color: var(--muted); }
.tmark-card .meta li strong { color: var(--ink); flex: 0 0 64px; font-weight: 500; }
.tmark-card .scope { font-size: 13.5px; color: var(--ink); line-height: 1.7; position: relative; }
.tmark-card .scope strong { display: block; color: var(--navy); font-size: 12px; letter-spacing: 1px; margin-bottom: 4px; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--navy), var(--blue-deep));
  color: #fff; border-radius: 22px; padding: 70px 50px; text-align: center;
  position: relative; overflow: hidden;
}
.cta-band::before { content:""; position:absolute; right:-60px; bottom:-60px; width:260px; height:260px; background:radial-gradient(circle, rgba(193,18,31,.28), transparent 70%); border-radius:50%; }
.cta-band::after { content:""; position:absolute; left:-50px; top:-50px; width:200px; height:200px; background:radial-gradient(circle, rgba(212,161,79,.20), transparent 70%); border-radius:50%; }
.cta-band h2 { font-family: var(--serif); font-size: clamp(24px, 3vw, 34px); margin-bottom: 14px; position: relative; }
.cta-band p { color: #d8e0ec; margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; position: relative; }
.cta-band .btn-gold { color: #2a2310; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.info-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 34px; }
.info-card h3 { font-family: var(--serif); color: var(--navy); margin-bottom: 18px; font-size: 20px; }
.info-list { list-style: none; display: grid; gap: 16px; }
.info-list li { display: flex; gap: 14px; align-items: flex-start; font-size: 15px; color: var(--ink); }
.info-list .k { flex: 0 0 84px; color: var(--muted); }
.info-list .v { color: var(--ink); }
.info-list .v a { color: var(--red); font-weight: 500; }
.form-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 34px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; color: var(--muted); margin-bottom: 7px; }
.field input, .field textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px;
  font-family: var(--sans); font-size: 15px; color: var(--ink); background: var(--gray-light);
  transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--red); box-shadow: 0 0 0 3px rgba(193,18,31,.10); }
.field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 13px; color: var(--muted); margin-top: 10px; }
.form-success { display: none; background: #eaf5ef; border: 1px solid #bfe3d2; color: var(--navy); padding: 14px 16px; border-radius: 10px; margin-bottom: 18px; font-size: 14px; }

/* ---------- Showcase / license images ---------- */
.showcase { text-align: center; margin-bottom: 50px; }
.showcase img { width: 100%; max-width: 920px; border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--line); }
.showcase .caption { font-size: 13px; color: var(--muted); margin-top: 14px; letter-spacing: 1px; }
.license-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; text-align: center; }
.license-card img { width: 100%; max-width: 640px; border-radius: 10px; box-shadow: 0 8px 28px rgba(0,0,0,.08); }
.license-card p { font-size: 13px; color: var(--muted); margin-top: 14px; }
.license-note { font-size: 12px; color: var(--muted); text-align: center; margin-top: 18px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-deep); color: #d8e0ec; padding: 64px 0 30px; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-top .brand .name { color: #fff; }
.footer-top .brand .name small { color: #9fb2d0; }
.footer-top p.desc { font-size: 14px; margin-top: 16px; max-width: 280px; color: #9fb2d0; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 16px; letter-spacing: 1px; }
.footer-col a { display: block; font-size: 14px; color: #9fb2d0; padding: 5px 0; transition: color .2s; }
.footer-col a:hover { color: var(--gold); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; padding-top: 24px; font-size: 13px; color: #7e91b0; }

/* ---------- Legal disclaimer bar ---------- */
.legal-note {
  margin: 0 0 22px; padding: 16px 20px;
  border: 1px solid rgba(212,161,79,.35); border-left: 3px solid var(--gold);
  border-radius: 6px; background: rgba(255,255,255,.04);
  font-size: 12px; line-height: 1.95; color: #c3cee0;
}
.legal-note .legal-title {
  display: inline-block; font-size: 12px; letter-spacing: 1px;
  color: var(--gold); font-weight: 600; margin-right: 8px;
}
.legal-note p { margin: 3px 0; }
.legal-note strong { color: var(--gold); font-weight: 600; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Hexagon decorations ---------- */
.hex-pattern {
  position: absolute; width: 120px; height: 120px; opacity: .08; pointer-events: none;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath fill='%23ffffff' d='M50 0 L93.3 25 V75 L50 100 L6.7 75 V25 Z'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero-media { order: -1; max-width: 560px; margin: 0 auto; }
}
@media (max-width: 920px) {
  .features { grid-template-columns: repeat(2, 1fr); }
  .products { grid-template-columns: 1fr; }
  .overview-cards { grid-template-columns: 1fr; }
  .num-cards { grid-template-columns: 1fr; }
  .product { flex-direction: column; }
  .split { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .showcase img { max-width: 100%; }
  .trademark-grid { grid-template-columns: 1fr; }
  .value-list { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .showcase img { max-width: 100%; }
  .license-card { padding: 16px; }
  .license-card img { max-width: 100%; }
  .license-note { font-size: 11px; }
  .nav-links {
    position: absolute; top: 76px; left: 0; right: 0; background: var(--white);
    flex-direction: column; align-items: stretch; gap: 0; padding: 10px 24px 20px;
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow); display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-links a::after { display: none; }
  .nav-cta { margin: 14px 0; text-align: center; }
  .hamburger { display: flex; }
  .site-header { position: relative; }
  .hero { padding: 80px 0 70px; }
  .hero-stats { gap: 28px; }
  .features { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}

/* ---------- 语言切换器（中/英 离线）---------- */
.lang { position: relative; margin-left: auto; }
.lang-btn {
  display: flex; align-items: center; gap: 6px; cursor: pointer;
  padding: 8px 14px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--white);
  font-size: 14px; color: var(--ink); user-select: none;
  transition: border-color .25s, color .25s;
}
.lang-btn:hover { border-color: var(--red); color: var(--red); }
.lang-btn .globe { font-size: 14px; line-height: 1; }
.lang-btn .caret { font-size: 9px; color: var(--muted); }
.lang-dropdown {
  position: absolute; top: calc(100% + 10px); right: 0;
  min-width: 150px; background: var(--white);
  border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow); padding: 6px; display: none; z-index: 60;
}
.lang-dropdown.open { display: block; }
.lang-item {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 12px; border-radius: 8px; cursor: pointer;
  font-size: 14px; transition: background .2s;
}
.lang-item:hover { background: var(--gray-light); }
.lang-item.active { color: var(--red); font-weight: 600; }
.lang-item .flag { font-size: 16px; line-height: 1; }

@media (max-width: 720px) {
  .lang { margin-left: 0; }
  .lang-btn { padding: 7px 12px; font-size: 13px; }
}