/* ============================================================
   甲乙广告 · 案例展示站点样式
   设计基调：编辑感 / 大字号 / 黑白 + 点缀红
   ============================================================ */

:root {
  --ink:      #141416;
  --ink-2:    #1d1d20;
  --paper:    #f6f5f1;
  --paper-2:  #ecebe5;
  --line:     rgba(20, 20, 22, .12);
  --line-dk:  rgba(255, 255, 255, .14);
  --muted:    #8b8b86;
  --accent:   #d53a2a;
  --accent-2: #b72f21;
  --font: "Inter", -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --serif: "Georgia", "Songti SC", "SimSun", serif;
  --nav-h: 72px;
  --container: 1240px;
}

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

html { scroll-behavior: smooth; }

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

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

.container { max-width: var(--container); margin: 0 auto; padding: 0 28px; }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 34px; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: .06em;
  transition: all .25s ease; cursor: pointer; border: 1px solid transparent;
}
.btn--accent { background: var(--accent); color: #fff; }
.btn--accent:hover { background: var(--accent-2); transform: translateY(-2px); box-shadow: 0 10px 30px rgba(213,58,42,.25); }
.btn--dark  { background: var(--ink); color: #fff; }
.btn--dark:hover { background: var(--accent); transform: translateY(-2px); }
.btn--light { background: transparent; color: #fff; border-color: rgba(255,255,255,.4); }
.btn--light:hover { background: #fff; color: var(--ink); border-color: #fff; }

/* ---------- 页头导航 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-h);
  transition: all .35s ease;
  color: #fff;
}
.site-header.is-scrolled {
  background: rgba(20,20,22,.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-dk);
}
.header-inner { height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.brand { display: flex; align-items: baseline; gap: 10px; }
.brand-logo { height: 40px; width: auto; }
.brand-cn { font-size: 21px; font-weight: 800; letter-spacing: .12em; }
.brand-en { font-size: 11px; letter-spacing: .28em; color: var(--muted); text-transform: uppercase; }

.main-nav { display: flex; gap: 6px; }
.nav-link {
  position: relative; padding: 8px 16px;
  font-size: 15px; opacity: .82; transition: opacity .2s;
}
.nav-link:hover { opacity: 1; }
.nav-link.is-active { opacity: 1; }
.nav-link.is-active::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 2px;
  height: 2px; background: var(--accent);
}
.header-cta {
  padding: 10px 22px; border: 1px solid rgba(255,255,255,.45); border-radius: 999px;
  font-size: 14px; transition: all .25s;
}
.header-cta:hover { background: #fff; color: var(--ink); border-color: #fff; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 26px; height: 2px; background: #fff; transition: all .3s; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首屏 Hero ---------- */
.hero {
  position: relative; height: 100vh; min-height: 640px;
  background: var(--ink); color: #fff;
  display: flex; align-items: flex-end;
  overflow: hidden;
}
.hero-banner-wrap {
  position: absolute; inset: 0; z-index: 0; overflow: hidden;
}
.hero-banner {
  width: 100%; height: 100%; object-fit: cover; object-position: center;
  opacity: .72;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(180deg, rgba(14,14,17,.66) 0%, rgba(14,14,17,.28) 45%, rgba(12,12,15,.92) 100%),
    radial-gradient(60% 80% at 80% 10%, rgba(213,58,42,.10), transparent 60%);
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: .35;
}
.hero-inner { position: relative; z-index: 2; width: 100%; padding-bottom: 9vh; }
.hero-kicker {
  display: flex; align-items: center; gap: 14px;
  font-size: 13px; letter-spacing: .34em; color: var(--muted);
  margin-bottom: 26px; text-transform: uppercase;
}
.hero-kicker::before { content: ""; width: 46px; height: 1px; background: var(--accent); }

.hero-slide { display: none; }
.hero-slide.is-active { display: block; animation: fadeUp .9s ease both; }
.hero-title {
  font-size: clamp(34px, 5.6vw, 76px);
  font-weight: 800; line-height: 1.12; letter-spacing: .01em;
  margin-bottom: 18px;
}
.hero-cn { font-size: clamp(16px, 1.8vw, 22px); color: rgba(255,255,255,.72); font-weight: 500; letter-spacing: .14em; }
.hero-meta {
  margin-top: 44px; display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
}
.hero-scroll {
  position: absolute; right: 34px; bottom: 8vh; z-index: 2;
  writing-mode: vertical-rl; font-size: 12px; letter-spacing: .3em; color: var(--muted);
}
.hero-scroll::after { content: ""; display: block; width: 1px; height: 60px; background: var(--line-dk); margin-top: 14px; margin-left: 5px; }

.hero-dots { display: flex; gap: 10px; }
.hero-dots button {
  width: 30px; height: 3px; border: 0; background: rgba(255,255,255,.25);
  cursor: pointer; transition: background .3s; padding: 0;
}
.hero-dots button.is-active { background: var(--accent); }

@keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: none; } }

/* ---------- 区块通用 ---------- */
.section { padding: 108px 0; }
.section--dark { background: var(--ink); color: #fff; }
.section--paper2 { background: var(--paper-2); }

.sec-head { margin-bottom: 64px; }
.sec-kicker {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 12px; letter-spacing: .32em; text-transform: uppercase; color: var(--muted);
  margin-bottom: 18px;
}
.sec-kicker::before { content: ""; width: 34px; height: 1px; background: var(--accent); }
.sec-title { font-size: clamp(28px, 3.6vw, 52px); font-weight: 800; line-height: 1.15; letter-spacing: .01em; }
.sec-sub { margin-top: 16px; max-width: 640px; color: var(--muted); font-size: 16px; }
.section--dark .sec-kicker { color: rgba(255,255,255,.5); }
.section--dark .sec-sub { color: rgba(255,255,255,.62); }

/* ---------- 关于摘要 + 数据 ---------- */
.about-strip {
  padding: 96px 0; border-bottom: 1px solid var(--line);
}
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 64px; align-items: start; }
.about-lead { font-size: clamp(20px, 2.2vw, 30px); line-height: 1.6; font-weight: 600; }
.about-lead em { font-style: normal; color: var(--accent); }
.about-text { color: var(--muted); font-size: 16px; }
.about-text p + p { margin-top: 14px; }
.about-link { display: inline-block; margin-top: 22px; font-weight: 700; font-size: 15px; border-bottom: 2px solid var(--accent); padding-bottom: 4px; transition: color .2s; }
.about-link:hover { color: var(--accent-2); }

.stats { margin-top: 64px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.stat { padding: 36px 28px 12px; border-right: 1px solid var(--line); }
.stat:first-child { padding-left: 0; }
.stat:last-child { border-right: 0; }
.stat-num { font-size: clamp(40px, 5vw, 68px); font-weight: 800; line-height: 1; }
.stat-num .unit { color: var(--accent); font-size: .55em; margin-left: 2px; }
.stat-label { margin-top: 10px; color: var(--muted); font-size: 14px; letter-spacing: .12em; }

/* ---------- 服务体系 ---------- */
.services { padding: 108px 0; }
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.service-card {
  border: 1px solid var(--line); border-radius: 16px; padding: 34px 28px;
  background: #fff; transition: transform .3s ease, box-shadow .3s ease;
  position: relative; overflow: hidden;
}
.service-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform .35s ease;
}
.service-card:hover { transform: translateY(-6px); box-shadow: 0 24px 50px rgba(20,20,22,.08); }
.service-card:hover::before { transform: scaleX(1); }
.service-no { font-size: 13px; letter-spacing: .2em; color: var(--accent); font-weight: 700; }
.service-title { font-size: 21px; font-weight: 800; margin: 12px 0 18px; }
.service-title-en { display: block; font-size: 11px; letter-spacing: .22em; color: var(--muted); font-weight: 500; margin-top: 4px; text-transform: uppercase; }
.service-list li {
  position: relative; padding: 7px 0 7px 18px; font-size: 14.5px; color: #3a3a3e;
  border-bottom: 1px dashed var(--line);
}
.service-list li::before { content: "·"; position: absolute; left: 4px; color: var(--accent); font-weight: 800; }
.service-list li:last-child { border-bottom: 0; }

/* ---------- 最新作品（首页大图位） ---------- */
.featured { padding: 108px 0; }
.featured-card { display: block; border-radius: 20px; overflow: hidden; background: var(--ink); color: #fff; position: relative; }
.featured-media { position: relative; aspect-ratio: 16/7.4; overflow: hidden; }
.featured-media .cover-img, .featured-media .cover-ph { width: 100%; height: 100%; object-fit: cover; }
.featured-media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(12,12,14,.82));
}
.cover-ph { display: flex; align-items: center; justify-content: center; }
.cover-ph span {
  font-size: clamp(30px, 6vw, 84px); font-weight: 800; letter-spacing: .06em;
  color: rgba(255,255,255,.92); text-shadow: 0 6px 30px rgba(0,0,0,.35);
}
.featured-info { position: absolute; left: 0; right: 0; bottom: 0; padding: 44px; z-index: 2; }
.featured-tag {
  display: inline-block; font-size: 12px; letter-spacing: .2em; color: #fff;
  background: rgba(213,58,42,.9); padding: 5px 14px; border-radius: 999px; margin-bottom: 16px;
}
.featured-title { font-size: clamp(22px, 2.6vw, 36px); font-weight: 800; line-height: 1.3; }
.featured-sum { margin-top: 10px; color: rgba(255,255,255,.72); font-size: 15px; max-width: 640px; }
.featured-arrow { position: absolute; right: 40px; bottom: 44px; font-size: 30px; z-index: 2; transition: transform .3s; }
.featured-card:hover .featured-arrow { transform: translate(6px, -6px); }

/* ---------- 年度案例 ---------- */
.cases { padding: 108px 0; }
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 34px; }
.case-card { display: block; }
.case-media { border-radius: 16px; overflow: hidden; aspect-ratio: 16/10; margin-bottom: 20px; position: relative; }
.case-media .cover-img, .case-media .cover-ph { width: 100%; height: 100%; object-fit: cover; }
.case-media .cover-ph span { font-size: clamp(26px, 4vw, 56px); }
.case-media::after {
  content: ""; position: absolute; inset: 0; border: 1px solid transparent; border-radius: 16px;
  transition: all .3s; pointer-events: none;
}
.case-card:hover .case-media { transform: translateY(-4px); }
.case-media { transition: transform .35s ease; }
.case-card:hover .case-media::after { border-color: rgba(213,58,42,.6); inset: 10px; }
.case-meta { display: flex; gap: 12px; align-items: center; font-size: 12.5px; letter-spacing: .1em; color: var(--muted); text-transform: uppercase; }
.case-meta .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--accent); }
.case-title { margin-top: 10px; font-size: 21px; font-weight: 700; line-height: 1.45; transition: color .2s; }
.case-card:hover .case-title { color: var(--accent-2); }
.case-tags { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 8px; }
.case-tags span { font-size: 12px; padding: 3px 12px; border: 1px solid var(--line); border-radius: 999px; color: #555; }

.sec-more { margin-top: 52px; text-align: center; }

/* ---------- 新闻动态 ---------- */
.news { padding: 108px 0; }
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.news-item { display: block; border-bottom: 1px solid var(--line); padding-bottom: 30px; transition: padding-left .3s; }
.news-item:hover { padding-left: 12px; }
.news-media { border-radius: 14px; overflow: hidden; aspect-ratio: 16/8; margin-bottom: 18px; }
.news-media .cover-img, .news-media .cover-ph { width: 100%; height: 100%; object-fit: cover; }
.news-media .cover-ph span { font-size: 30px; }
.news-cat {
  display: inline-block; font-size: 12px; letter-spacing: .18em; color: var(--accent);
  font-weight: 700; text-transform: uppercase; margin-bottom: 10px;
}
.news-date { color: var(--muted); font-size: 13px; }
.news-title { font-size: 19px; font-weight: 700; line-height: 1.5; margin: 8px 0 10px; }
.news-excerpt { color: var(--muted); font-size: 14.5px; }

/* ---------- 客户 ---------- */
.clients { padding: 108px 0; }
.client-groups { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px; }
.client-group { border: 1px solid var(--line); border-radius: 14px; padding: 24px; background: #fff; }
.client-group h4 { font-size: 14px; letter-spacing: .16em; color: var(--muted); font-weight: 700; margin-bottom: 14px; text-transform: uppercase; }
.client-group ul { display: flex; flex-wrap: wrap; gap: 8px; }
.client-group li {
  font-size: 13px; padding: 5px 13px; background: var(--paper-2); border-radius: 999px; color: #333;
}

/* ---------- 子页通用 Hero ---------- */
.page-hero { background: var(--ink); color: #fff; padding: calc(var(--nav-h) + 90px) 0 76px; position: relative; overflow: hidden; }
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(50% 90% at 85% 0%, rgba(213,58,42,.14), transparent 55%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(32px, 4.6vw, 60px); font-weight: 800; line-height: 1.15; }
.page-hero .lead { margin-top: 16px; color: rgba(255,255,255,.66); font-size: 16.5px; max-width: 620px; }

/* ---------- 关于页 ---------- */
.about-mission { padding: 96px 0; }
.mission-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.about-detail h3 { font-size: 22px; font-weight: 800; margin: 34px 0 12px; }
.about-detail p { color: #4a4a4e; margin-bottom: 12px; }
.principle-list { margin-top: 40px; border-top: 1px solid var(--line); }
.principle { display: grid; grid-template-columns: 84px 1fr; gap: 20px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.principle-no { font-size: 13px; letter-spacing: .2em; color: var(--accent); font-weight: 800; }
.principle h4 { font-size: 19px; margin-bottom: 6px; }
.principle p { color: var(--muted); font-size: 14.5px; }

/* ---------- 服务页 ---------- */
.services-page .service-grid { grid-template-columns: repeat(2, 1fr); }
.service-card--wide { display: grid; grid-template-columns: 1fr 1.4fr; gap: 30px; align-items: center; }
.service-desc { color: var(--muted); font-size: 14.5px; }

/* ---------- 案例列表页 ---------- */
.works-filter { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 44px; }
.filter-btn {
  padding: 8px 20px; border: 1px solid var(--line); border-radius: 999px; background: #fff;
  font-size: 14px; cursor: pointer; transition: all .25s; font-family: var(--font);
}
.filter-btn:hover { border-color: var(--ink); }
.filter-btn.is-active { background: var(--ink); color: #fff; border-color: var(--ink); }
.works-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.works-grid .case-media { aspect-ratio: 4/3; }
.works-grid .case-title { font-size: 17px; }

/* ---------- 案例详情 ---------- */
.detail-hero { background: var(--ink); color: #fff; padding: calc(var(--nav-h) + 80px) 0 60px; }
.detail-hero .crumbs { font-size: 13px; color: rgba(255,255,255,.55); margin-bottom: 24px; letter-spacing: .08em; }
.detail-hero .crumbs a:hover { color: #fff; }
.detail-hero h1 { font-size: clamp(26px, 3.6vw, 46px); line-height: 1.3; max-width: 900px; }
.detail-meta { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 12px; }
.detail-meta span { font-size: 13px; padding: 6px 16px; border: 1px solid var(--line-dk); border-radius: 999px; color: rgba(255,255,255,.8); }
.detail-body { padding: 84px 0; }
.detail-layout { display: grid; grid-template-columns: 240px 1fr; gap: 64px; align-items: start; }
.detail-side { position: sticky; top: calc(var(--nav-h) + 30px); }
.detail-side h4 { font-size: 12px; letter-spacing: .24em; color: var(--muted); margin-bottom: 14px; text-transform: uppercase; }
.detail-side ul li { padding: 7px 0; border-bottom: 1px solid var(--line); font-size: 14px; color: #333; }
.detail-side ul li b { display: block; font-size: 12px; color: var(--muted); font-weight: 500; letter-spacing: .08em; }
.detail-content p { font-size: 17px; color: #2e2e32; line-height: 2; margin-bottom: 22px; }
.detail-content .lead-p { font-size: 19px; font-weight: 600; color: var(--ink); }
.detail-images { margin-top: 40px; display: grid; gap: 24px; }
.detail-images .img-ph {
  border-radius: 16px; overflow: hidden; aspect-ratio: 16/9;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.9); font-weight: 700; letter-spacing: .1em;
}
.results-box { margin-top: 44px; border: 1px solid var(--line); border-radius: 16px; padding: 30px; background: #fff; }
.results-box h4 { font-size: 14px; letter-spacing: .2em; color: var(--accent); margin-bottom: 16px; text-transform: uppercase; }
.results-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.results-list li { padding: 16px; background: var(--paper-2); border-radius: 10px; font-weight: 700; font-size: 15px; }

.detail-nav { margin-top: 60px; display: flex; justify-content: space-between; gap: 20px; }
.detail-nav a { font-size: 14px; font-weight: 600; color: var(--muted); transition: color .2s; }
.detail-nav a:hover { color: var(--accent); }

/* ---------- 新闻页 ---------- */
.news-list-page .news-item { display: grid; grid-template-columns: 240px 1fr; gap: 28px; align-items: center; border: 1px solid var(--line); border-radius: 16px; padding: 20px; margin-bottom: 24px; }
.news-list-page .news-media { margin-bottom: 0; aspect-ratio: 16/9; }
.news-list-page .news-item:hover { padding-left: 24px; }
.news-cat--tag { background: var(--paper-2); color: var(--accent); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 72px; align-items: start; }
.contact-info li { display: flex; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.contact-info .k { font-size: 13px; letter-spacing: .18em; color: var(--muted); min-width: 96px; text-transform: uppercase; }
.contact-info .v { font-size: 17px; font-weight: 600; }
.contact-form { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 40px; }
.form-row { margin-bottom: 22px; }
.form-row label { display: block; font-size: 13px; letter-spacing: .1em; color: var(--muted); margin-bottom: 8px; }
.form-row input, .form-row textarea, .form-row select {
  width: 100%; padding: 13px 16px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 15px; font-family: var(--font); background: var(--paper); transition: border-color .2s;
}
.form-row input:focus, .form-row textarea:focus, .form-row select:focus { outline: none; border-color: var(--accent); background: #fff; }
.form-row textarea { min-height: 130px; resize: vertical; }
.form-tip { margin-top: 14px; font-size: 12.5px; color: var(--muted); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--ink); color: rgba(255,255,255,.75); padding: 84px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1.2fr 1.2fr; gap: 48px; padding-bottom: 60px; border-bottom: 1px solid var(--line-dk); }
.footer-logo .brand-en { color: rgba(255,255,255,.4); }
.footer-logo img { height: 46px; width: auto; }
.footer-note { margin-top: 18px; font-size: 14px; color: rgba(255,255,255,.5); max-width: 320px; line-height: 1.8; }
.footer-col h4 { font-size: 12px; letter-spacing: .26em; color: rgba(255,255,255,.4); margin-bottom: 20px; text-transform: uppercase; }
.footer-col li { margin-bottom: 12px; }
.footer-col a { transition: color .2s; font-size: 14.5px; }
.footer-col a:hover { color: #fff; }
.cta-title { font-size: 19px; font-weight: 700; color: #fff; line-height: 1.5; margin-bottom: 18px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; padding: 26px 28px; font-size: 13px; color: rgba(255,255,255,.4); flex-wrap: wrap; }

/* ---------- 滚动显现动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .client-groups { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .mission-grid, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .detail-layout { grid-template-columns: 1fr; gap: 36px; }
  .detail-side { position: static; }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }
  .section { padding: 72px 0; }
  .main-nav {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: var(--ink); flex-direction: column; padding: 20px 28px 32px;
    gap: 4px; transform: translateY(-140%); transition: transform .35s ease; z-index: 99;
    border-bottom: 1px solid var(--line-dk);
  }
  .main-nav.is-open { transform: none; }
  .nav-link { padding: 14px 4px; font-size: 17px; border-bottom: 1px solid var(--line-dk); }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }
  .case-grid, .news-grid, .service-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; gap: 0; }
  .stat { border-right: 0; border-bottom: 1px solid var(--line); padding: 26px 0; }
  .stat:last-child { border-bottom: 0; }
  .featured-info { padding: 26px; }
  .featured-arrow { right: 26px; bottom: 30px; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .news-list-page .news-item { grid-template-columns: 1fr; }
  .hero-scroll { display: none; }
  .works-grid { grid-template-columns: 1fr; }
  .services-page .service-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 26px; }
}

/* 联系表单结果提示 */
.form-msg { border-radius:10px; padding:14px 18px; font-size:14.5px; line-height:1.6; margin-bottom:22px; }
.form-msg--ok   { background:rgba(38,166,91,.10); color:#1f8a4d; border:1px solid rgba(38,166,91,.30); }
.form-msg--err  { background:rgba(213,58,42,.08); color:var(--accent); border:1px solid rgba(213,58,42,.30); }


/* ---------- 语言切换 ---------- */
.header-tools { display: flex; align-items: center; gap: 16px; }
.lang-switch { display: flex; align-items: center; gap: 6px; font-size: 13px; letter-spacing: .08em; }
.lang-switch a { opacity: .6; padding: 4px 2px; transition: opacity .2s; }
.lang-switch a:hover { opacity: 1; }
.lang-switch a.is-active { opacity: 1; font-weight: 700; }
.lang-divider { opacity: .35; }
@media (max-width: 900px) {
  .header-tools { gap: 10px; }
  .lang-switch { font-size: 12px; }
}