/* =========================================================
   逆鳞设计 · 义乌市逆鳞图文设计工作室官网
   设计系统样式表
   ========================================================= */

:root {
  --ink: #161310;          /* 深炭 */
  --ink-2: #211c17;
  --paper: #f6f2ea;        /* 米白 */
  --paper-2: #efe9de;
  --gold: #b8935a;         /* 暖金 */
  --gold-2: #d6b47c;
  --muted: #6d655c;
  --line: #e4dccd;
  --dark: #100d0a;
  --dark-2: #181310;
  --white: #ffffff;
  --serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --maxw: 1240px;
  --gutter: clamp(20px, 4vw, 56px);
  --nav-h: 76px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --shadow: 0 24px 60px -24px rgba(20,15,8,.35);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

::selection { background: var(--gold); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #e9e2d4; }
::-webkit-scrollbar-thumb { background: #c7b999; border-radius: 99px; border: 2px solid #e9e2d4; }
::-webkit-scrollbar-thumb:hover { background: var(--gold); }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }

/* ---------- 顶部进度条 ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--gold), var(--gold-2));
  z-index: 1001; transition: width .08s linear;
}

/* ---------- 导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  transition: background .4s var(--ease), box-shadow .4s var(--ease), height .4s var(--ease);
  color: #fff;
}
.site-header::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,8,5,.55), rgba(10,8,5,0));
  opacity: 1; transition: opacity .4s var(--ease); pointer-events: none;
}
.site-header.scrolled { color: var(--ink); height: 64px; background: rgba(246,242,234,.92); backdrop-filter: blur(14px); box-shadow: 0 8px 30px -18px rgba(20,15,8,.35); }
.site-header.scrolled::before { opacity: 0; }
.header-inner { height: 100%; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; position: relative; }
.brand-logo { width: 44px; height: 44px; object-fit: contain; border-radius: 9px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-family: var(--serif); font-size: 17px; letter-spacing: .08em; font-weight: 700; }
.brand-text em { font-style: normal; font-size: 9.5px; letter-spacing: .3em; opacity: .62; text-transform: uppercase; }

.main-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-link {
  position: relative; padding: 9px 13px; font-size: 14px; letter-spacing: .04em;
  color: inherit; opacity: .92; transition: opacity .25s, color .25s; white-space: nowrap;
}
.nav-link::after {
  content: ""; position: absolute; left: 13px; right: 13px; bottom: 3px; height: 1.5px;
  background: var(--gold); transform: scaleX(0); transform-origin: left; transition: transform .3s var(--ease);
}
.nav-link:hover, .nav-link.active { opacity: 1; }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }

/* 案例下拉 */
.has-drop { position: relative; }
.drop-menu {
  position: absolute; top: 100%; left: 50%; transform: translate(-50%, 10px);
  background: #fff; color: var(--ink); min-width: 220px; border-radius: 12px;
  box-shadow: var(--shadow); padding: 8px; opacity: 0; visibility: hidden;
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
  display: grid; grid-template-columns: 1fr 1fr; gap: 2px;
}
.has-drop:hover .drop-menu { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.drop-menu a { padding: 9px 14px; border-radius: 8px; font-size: 13.5px; color: var(--muted); transition: .2s; }
.drop-menu a:hover { background: var(--paper); color: var(--ink); }

.header-actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.header-phone { display: flex; align-items: center; gap: 8px; font-size: 13.5px; letter-spacing: .03em; font-weight: 600; }
.header-phone .dot { width: 8px; height: 8px; border-radius: 50%; background: #5fbf77; box-shadow: 0 0 0 0 rgba(95,191,119,.5); animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(95,191,119,.5);} 70% { box-shadow: 0 0 0 8px rgba(95,191,119,0);} 100% { box-shadow: 0 0 0 0 rgba(95,191,119,0);} }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: currentColor; transition: .3s var(--ease); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 34px; border-radius: 999px; font-size: 15px; letter-spacing: .06em;
  font-weight: 600; transition: all .35s var(--ease); position: relative; overflow: hidden;
}
.btn-gold { background: var(--gold); color: #fff; }
.btn-gold:hover { background: var(--gold-2); transform: translateY(-2px); box-shadow: 0 18px 34px -16px rgba(184,147,90,.7); }
.btn-ghost { border: 1px solid rgba(255,255,255,.4); color: #fff; }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-2px); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #000; transform: translateY(-2px); }
.btn .arr { transition: transform .3s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }

/* ---------- 通用分区 ---------- */
.section { padding: clamp(72px, 10vw, 130px) 0; }
.section-dark { background: var(--dark); color: #e9e2d4; }
.section-tint { background: var(--paper-2); }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px; font-size: 12.5px;
  letter-spacing: .28em; text-transform: uppercase; color: var(--gold); font-weight: 600;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--gold); }
.h2 {
  font-family: var(--serif); font-size: clamp(28px, 4.4vw, 46px); line-height: 1.25;
  font-weight: 700; letter-spacing: .02em; margin: 18px 0 16px;
}
.lead { font-size: 16.5px; color: var(--muted); max-width: 660px; }
.section-head { margin-bottom: clamp(40px, 6vw, 68px); }
.section-head.center { text-align: center; }
.section-head.center .lead { margin-left: auto; margin-right: auto; }
.section-head.center .eyebrow { justify-content: center; }

/* ---------- 渐入动画 ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .1s; }
.reveal[data-delay="2"] { transition-delay: .2s; }
.reveal[data-delay="3"] { transition-delay: .3s; }
.reveal[data-delay="4"] { transition-delay: .4s; }
.reveal[data-delay="5"] { transition-delay: .5s; }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  color: #fff; overflow: hidden; background: #0c0a08;
}
.hero-bg { position: absolute; inset: -8%; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.08); animation: heroZoom 18s var(--ease) forwards; filter: grayscale(1) contrast(1.12) brightness(0.82); }
@keyframes heroZoom { to { transform: scale(1); } }
.hero-overlay {
  position: absolute; inset: 0;
  background:
    radial-gradient(120% 90% at 50% 38%, rgba(10,8,5,.1) 0%, rgba(10,8,5,.42) 60%, rgba(10,8,5,.88) 100%),
    linear-gradient(180deg, rgba(10,8,5,.78) 0%, rgba(10,8,5,.26) 44%, rgba(10,8,5,.86) 100%);
}
.hero-inner { position: relative; z-index: 2; padding-top: var(--nav-h); padding-bottom: 60px; }
.hero .eyebrow { color: var(--gold-2); }
.hero-title {
  font-family: var(--serif); font-size: clamp(38px, 7vw, 76px); line-height: 1.14;
  font-weight: 700; letter-spacing: .03em; max-width: 900px; margin: 26px 0 24px;
}
.hero-title .accent { color: var(--gold-2); }
.hero-sub { font-size: clamp(15px, 1.6vw, 18px); color: rgba(255,255,255,.82); max-width: 620px; }
.hero-cta { display: flex; gap: 16px; margin-top: 40px; flex-wrap: wrap; }
.hero-stats {
  display: flex; gap: clamp(28px, 5vw, 64px); margin-top: clamp(48px, 7vw, 80px);
  flex-wrap: wrap;
}
.hero-stat .num { font-family: var(--serif); font-size: clamp(30px, 4vw, 44px); font-weight: 700; color: #fff; }
.hero-stat .num em { font-style: normal; color: var(--gold-2); }
.hero-stat .lbl { font-size: 13px; letter-spacing: .14em; color: rgba(255,255,255,.6); margin-top: 6px; }
.scroll-cue { position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%); z-index: 2; color: rgba(255,255,255,.7); font-size: 12px; letter-spacing: .3em; display: flex; flex-direction: column; align-items: center; gap: 10px; }
.scroll-cue::after { content: ""; width: 1px; height: 44px; background: linear-gradient(rgba(255,255,255,.6), transparent); animation: cue 2s infinite; }
@keyframes cue { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 50.1% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* ---------- 内页 Hero ---------- */
.page-hero {
  position: relative; padding: calc(var(--nav-h) + clamp(56px, 9vw, 110px)) 0 clamp(48px, 7vw, 84px);
  color: #fff; background: #0c0a08; overflow: hidden;
}
.page-hero .bg { position: absolute; inset: 0; }
.page-hero .bg img { width: 100%; height: 100%; object-fit: cover; opacity: .4; }
.page-hero .bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8,6,4,.8), rgba(8,6,4,.68)); }
.page-hero .container { position: relative; z-index: 2; }
.page-hero .h2 { color: #fff; }
.page-hero .lead { color: rgba(255,255,255,.75); }
.crumb { display: flex; gap: 8px; font-size: 13px; color: rgba(255,255,255,.55); margin-top: 26px; flex-wrap: wrap; }
.crumb a:hover { color: var(--gold-2); }

/* ---------- 卡片与网格 ---------- */
.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border-radius: 16px; overflow: hidden; box-shadow: 0 10px 40px -24px rgba(20,15,8,.28);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease);
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }

/* 案例卡片 */
.case-card { position: relative; display: block; aspect-ratio: 4/5; overflow: hidden; border-radius: 16px; }
.case-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.case-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,8,5,0) 40%, rgba(10,8,5,.85)); transition: opacity .4s; }
.case-card:hover img { transform: scale(1.07); }
.case-card .cc-body { position: absolute; left: 0; right: 0; bottom: 0; z-index: 2; padding: 26px; color: #fff; }
.case-card .cc-tag { font-size: 11.5px; letter-spacing: .22em; color: var(--gold-2); }
.case-card .cc-title { font-family: var(--serif); font-size: 24px; font-weight: 700; margin: 6px 0 4px; }
.case-card .cc-meta { font-size: 13px; color: rgba(255,255,255,.72); }
.case-card .cc-count { position: absolute; top: 18px; right: 18px; z-index: 2; background: rgba(255,255,255,.16); backdrop-filter: blur(8px); padding: 5px 12px; border-radius: 99px; font-size: 12px; color: #fff; }

/* 服务卡片 */
.svc-card { padding: 36px 32px; height: 100%; }
.svc-num { font-family: var(--serif); font-size: 44px; color: transparent; -webkit-text-stroke: 1px var(--gold); line-height: 1; margin-bottom: 18px; }
.svc-card h3 { font-family: var(--serif); font-size: 21px; margin-bottom: 12px; letter-spacing: .02em; }
.svc-card p { color: var(--muted); font-size: 15px; }
.svc-card ul { margin-top: 16px; }
.svc-card li { padding: 5px 0 5px 22px; position: relative; font-size: 14.5px; color: var(--muted); }
.svc-card li::before { content: ""; position: absolute; left: 0; top: 14px; width: 10px; height: 1px; background: var(--gold); }

/* 价值标签 */
.pill { display: inline-flex; align-items: center; gap: 8px; padding: 9px 18px; border-radius: 99px; border: 1px solid var(--line); font-size: 13.5px; color: var(--muted); background: #fff; transition: .25s; }
.pill:hover { border-color: var(--gold); color: var(--ink); }
.pill b { color: var(--ink); font-weight: 600; }

/* ---------- 数字统计 ---------- */
.stat-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.stat-cell { text-align: center; padding: 10px; }
.stat-cell .v { font-family: var(--serif); font-size: clamp(38px, 5vw, 58px); font-weight: 700; color: var(--gold-2); }
.stat-cell .v em { font-style: normal; font-size: .5em; }
.stat-cell .k { margin-top: 10px; font-size: 14px; letter-spacing: .12em; color: rgba(255,255,255,.62); }

/* ---------- 流程时间轴 ---------- */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 1px; background: linear-gradient(var(--gold), var(--line)); }
.tl-item { position: relative; padding: 0 0 38px 26px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before { content: ""; position: absolute; left: -27px; top: 8px; width: 13px; height: 13px; border-radius: 50%; background: var(--paper); border: 3px solid var(--gold); }
.tl-item .tl-step { font-size: 12px; letter-spacing: .2em; color: var(--gold); font-weight: 600; }
.tl-item h3 { font-family: var(--serif); font-size: 20px; margin: 8px 0 8px; }
.tl-item p { color: var(--muted); font-size: 15px; }

/* ---------- FAQ ---------- */
.faq-toolbar { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin-bottom: 30px; }
.faq-search { flex: 1; min-width: 240px; position: relative; }
.faq-search input { width: 100%; padding: 14px 18px 14px 44px; border: 1px solid var(--line); border-radius: 12px; background: #fff; font-size: 15px; font-family: inherit; color: var(--ink); outline: none; transition: border .25s, box-shadow .25s; }
.faq-search input:focus { border-color: var(--gold); box-shadow: 0 0 0 4px rgba(184,147,90,.14); }
.faq-search::before { content: "⌕"; position: absolute; left: 16px; top: 50%; transform: translateY(-50%); font-size: 20px; color: var(--gold); }
.faq-group-tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.faq-tab { padding: 9px 18px; border-radius: 99px; border: 1px solid var(--line); font-size: 13.5px; color: var(--muted); background: #fff; transition: .25s; }
.faq-tab:hover, .faq-tab.active { background: var(--ink); border-color: var(--ink); color: #fff; }

.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 14px; margin-bottom: 14px; overflow: hidden; transition: border .3s; }
.faq-item.open { border-color: var(--gold); }
.faq-q { width: 100%; display: flex; align-items: center; gap: 16px; padding: 20px 24px; text-align: left; font-size: 16px; font-weight: 600; color: var(--ink); }
.faq-q .q-badge { flex-shrink: 0; width: 28px; height: 28px; border-radius: 8px; background: var(--paper-2); color: var(--gold); display: grid; place-items: center; font-size: 13px; font-weight: 700; }
.faq-q .q-plus { margin-left: auto; flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%; border: 1px solid var(--line); position: relative; transition: .3s; }
.faq-q .q-plus::before, .faq-q .q-plus::after { content: ""; position: absolute; inset: 0; margin: auto; background: var(--muted); transition: .3s; }
.faq-q .q-plus::before { width: 12px; height: 1.5px; }
.faq-q .q-plus::after { width: 1.5px; height: 12px; }
.faq-item.open .q-plus { background: var(--gold); border-color: var(--gold); transform: rotate(180deg); }
.faq-item.open .q-plus::before, .faq-item.open .q-plus::after { background: #fff; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .45s var(--ease); }
.faq-a-inner { padding: 0 24px 24px 68px; color: var(--muted); font-size: 15px; }
.faq-empty { display: none; text-align: center; color: var(--muted); padding: 40px; }
.faq-empty.show { display: block; }

/* ---------- 灯箱 ---------- */
.lightbox { position: fixed; inset: 0; z-index: 2000; background: rgba(10,8,5,.94); display: none; align-items: center; justify-content: center; padding: 40px; }
.lightbox.show { display: flex; }
.lightbox img { max-width: 100%; max-height: 86vh; border-radius: 8px; box-shadow: 0 40px 80px rgba(0,0,0,.5); }
.lb-close { position: absolute; top: 26px; right: 32px; color: #fff; font-size: 15px; letter-spacing: .1em; display: flex; align-items: center; gap: 8px; }
.lb-close span { font-size: 34px; line-height: 1; }
.lb-nav { position: absolute; top: 50%; transform: translateY(-50%); color: #fff; font-size: 40px; padding: 20px; opacity: .7; }
.lb-nav:hover { opacity: 1; }
.lb-prev { left: 16px; }
.lb-next { right: 16px; }
.lb-count { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); color: rgba(255,255,255,.7); font-size: 14px; letter-spacing: .12em; }

/* ---------- 图库 ---------- */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.gallery figure { position: relative; overflow: hidden; border-radius: 12px; cursor: zoom-in; aspect-ratio: 4/3; }
.gallery img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease); }
.gallery figure:hover img { transform: scale(1.06); }
.gallery figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 18px; color: #fff; font-size: 13px; background: linear-gradient(transparent, rgba(0,0,0,.72)); opacity: 0; transition: .3s; }
.gallery figure:hover figcaption { opacity: 1; }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: start; }
.form-card { background: #fff; border-radius: 18px; padding: clamp(26px, 4vw, 44px); box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-size: 13.5px; margin-bottom: 8px; color: var(--muted); letter-spacing: .04em; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 13px 16px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 15px; font-family: inherit; background: var(--paper); color: var(--ink); outline: none; transition: border .25s, box-shadow .25s;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { border-color: var(--gold); box-shadow: 0 0 0 4px rgba(184,147,90,.14); background: #fff; }
.form-field textarea { min-height: 120px; resize: vertical; }

.info-list li { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.info-list li:last-child { border-bottom: none; }
.info-ico { flex-shrink: 0; width: 46px; height: 46px; border-radius: 12px; background: var(--paper-2); display: grid; place-items: center; font-size: 20px; color: var(--gold); }
.info-list h4 { font-size: 13px; color: var(--muted); letter-spacing: .08em; margin-bottom: 3px; }
.info-list p { font-size: 16px; font-weight: 600; }
.info-list p small { font-weight: 400; color: var(--muted); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--dark); color: #b9b0a3; padding: clamp(60px, 8vw, 90px) 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 50px; }
.footer-brand .brand-logo { width: 50px; height: 50px; margin-bottom: 18px; }
.footer-brand p { font-size: 14px; line-height: 1.9; color: #9a9184; max-width: 300px; }
.footer-col h4 { color: #fff; font-size: 14px; letter-spacing: .16em; margin-bottom: 20px; font-weight: 600; }
.footer-col a { display: block; padding: 6px 0; font-size: 14px; color: #9a9184; transition: .2s; }
.footer-col a:hover { color: var(--gold-2); padding-left: 6px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 26px 0; font-size: 13px; color: #766e62; }
.footer-bottom .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-bottom a { color: #9a9184; }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 900; width: 48px; height: 48px; border-radius: 50%;
  background: var(--ink); color: #fff; display: grid; place-items: center; font-size: 20px;
  opacity: 0; visibility: hidden; transform: translateY(12px); transition: .35s var(--ease);
  box-shadow: var(--shadow);
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--gold); }

/* ---------- 移动端 ---------- */
@media (max-width: 1100px) {
  .main-nav { gap: 0; }
  .nav-link { padding: 9px 9px; font-size: 13px; }
  .header-phone span:not(.dot) { display: none; }
}
@media (max-width: 920px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; top: 0; right: 0; bottom: 0; width: min(320px, 86vw);
    background: #fff; color: var(--ink); flex-direction: column; align-items: flex-start;
    gap: 2px; padding: 90px 30px 30px; transform: translateX(100%); transition: transform .45s var(--ease);
    box-shadow: -30px 0 60px rgba(0,0,0,.18); z-index: 999;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav .nav-link { font-size: 17px; padding: 12px 0; width: 100%; border-bottom: 1px solid var(--line); }
  .main-nav .nav-link::after { display: none; }
  .has-drop .drop-menu { position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none; padding: 4px 0 8px 12px; min-width: 0; display: flex; flex-direction: column; }
  .header-phone span:not(.dot) { display: inline; }
  .nav-backdrop { position: fixed; inset: 0; background: rgba(10,8,5,.5); z-index: 998; opacity: 0; visibility: hidden; transition: .3s; }
  .nav-backdrop.show { opacity: 1; visibility: visible; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .stat-band { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; }
  .btn { width: 100%; }
}

/* 打印与可访问性 */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}