/* ============================================================
   博飞远传媒官网 · 视觉系统
   工程感深色 + 信号橙  |  近黑 #0B0D10 / 橙 #E8752C
   ============================================================ */

:root {
  --bg:            #0B0D10;   /* 主背景，近黑 */
  --bg-alt:        #101318;   /* 交替段落背景 */
  --panel:         #171B21;   /* 卡片 / 面板 */
  --panel-2:       #12161C;   /* 浮层 */
  --line:          #232A33;   /* 分隔线 */
  --line-strong:   #2A303A;   /* 卡片边框 */
  --accent:        #E8752C;   /* 信号橙，唯一强调色 */
  --accent-soft:   #F08A45;
  --accent-ink:    #3A1D08;   /* 橙底上的深字 */
  --ink:           #F4F2ED;   /* 主文字，米白 */
  --ink-2:         #A7AEB9;   /* 次级文字 */
  --ink-3:         #8E96A2;   /* 弱化文字 */
  --ink-4:         #707985;   /* 更弱 */
  --ink-5:         #626A76;   /* 最小字 */
  --brand-big:     #1B222B;   /* 页脚超大字的暗色 */

  --maxw:          1440px;
  --pad:           60px;
  --radius:        3px;

  --ff-cn:  "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --ff-num: "Bebas Neue", "Oswald", "Archivo Narrow", sans-serif;
  --ff-en:  "Barlow Condensed", "Oswald", sans-serif;

  --header-h: 88px;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--ff-cn);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4, p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

/* ---------- layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}
.section { padding: 110px 0; }
.section.alt { background: var(--bg-alt); }

.eyebrow {
  font-family: var(--ff-en);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 14px;
  display: inline-block;
}
.section-title {
  font-family: var(--ff-cn);
  font-weight: 900;
  font-size: 44px;
  line-height: 1.18;
  letter-spacing: -0.5px;
  color: var(--ink);
}
.section-sub {
  margin-top: 16px;
  font-size: 16px;
  color: var(--ink-2);
  max-width: 720px;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 48px;
}
.text-link {
  font-family: var(--ff-en);
  font-weight: 700;
  letter-spacing: 1.4px;
  font-size: 13px;
  color: var(--accent);
  white-space: nowrap;
  text-transform: uppercase;
}
.text-link:hover { color: var(--accent-soft); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ff-cn);
  font-weight: 700;
  font-size: 15px;
  padding: 16px 30px;
  border-radius: 2px;
  border: 1px solid transparent;
  transition: transform .15s ease, background .15s ease, color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-sm { padding: 13px 24px; font-size: 14px; }
.btn-block { width: 100%; }
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: var(--accent-soft); }
.btn-ghost { background: var(--panel); color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { background: #1d222a; }
.btn-dark { background: var(--bg); color: var(--ink); }
.btn-dark:hover { background: #15191f; }
.btn-outline { background: transparent; color: var(--bg); border-color: var(--bg); }
.btn-outline:hover { background: var(--bg); color: var(--accent); }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(11, 13, 16, .82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 30px; height: 36px; flex: none; }
.brand-mark svg { width: 100%; height: 100%; }
.brand-text { display: flex; flex-direction: column; gap: 1px; line-height: 1; }
.brand-cn { font-weight: 900; font-size: 19px; color: var(--ink); letter-spacing: 1px; }
.brand-en {
  font-family: var(--ff-en);
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 1.6px;
  color: var(--accent);
}
.nav { display: flex; align-items: center; gap: 34px; }
.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
  transition: color .15s ease;
}
.nav-link:hover, .nav-link.active { color: var(--accent); }
.header-actions { display: flex; align-items: center; gap: 22px; }
.header-tel {
  font-family: var(--ff-en);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 1px;
  color: var(--ink-2);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 38px; height: 38px;
  background: transparent; border: none; padding: 8px;
}
.nav-toggle span { display: block; height: 2px; background: var(--ink); border-radius: 2px; transition: .2s; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 720px;
  background: var(--bg);
}
.hero-left {
  padding: 108px 60px 56px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 24px;
}
.hero-eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--ff-en); font-weight: 700; font-size: 13px;
  letter-spacing: 2px; color: var(--accent); text-transform: uppercase;
}
.hero-eyebrow i { width: 8px; height: 8px; background: var(--accent); display: inline-block; }
.hero h1 {
  font-weight: 900; font-size: 66px; line-height: 1.24;
  letter-spacing: -1px; color: var(--ink);
}
.hero h1 .accent { color: var(--accent); }
.hero-rule { width: 56px; height: 3px; background: var(--accent); }
.hero-sub { font-size: 17px; line-height: 1.9; color: var(--ink-2); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-params {
  font-size: 12px; color: var(--ink-4); letter-spacing: .5px;
}
.hero-right { position: relative; background: var(--panel); overflow: hidden; }
.hero-right img { width: 100%; height: 100%; object-fit: cover; }
.hero-info {
  position: absolute; left: 36px; bottom: 36px;
  width: 344px; max-width: calc(100% - 72px);
  background: rgba(18, 22, 28, .92);
  border: 1px solid var(--line-strong);
  padding: 16px 20px;
  display: flex; flex-direction: column; gap: 5px;
}
.hero-info .eyebrow { margin-bottom: 4px; }
.hero-info h4 { font-size: 17px; font-weight: 700; color: var(--ink); }
.hero-info p { font-size: 12px; color: var(--ink-3); }

/* 业务跑马灯 */
.ticker {
  background: var(--accent);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 60px; height: 52px;
  color: var(--bg);
}
.ticker .t-services {
  font-weight: 700; font-size: 14px; letter-spacing: 1px;
}
.ticker .t-brand {
  font-family: var(--ff-en); font-weight: 700; font-size: 15px; letter-spacing: 2px;
}

/* 实力数据条 */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--bg-alt);
  border-bottom: 1px solid var(--line);
}
.stat {
  padding: 48px 36px;
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 4px;
}
.stat:last-child { border-right: none; }
.stat .num {
  font-family: var(--ff-num);
  font-size: 58px; line-height: 1; color: var(--ink);
}
.stat:nth-child(2) .num { color: var(--accent); }
.stat .lab { font-size: 13px; color: var(--ink-3); }
.stats-note {
  background: var(--bg-alt);
  padding: 12px 60px;
  font-size: 11px; color: var(--ink-5);
}

/* ============================================================
   SERVICE MATRIX (首页非对称栅格)
   ============================================================ */
.bento { display: grid; grid-template-columns: 640px 1fr; gap: 16px; }
.bento-col { display: flex; flex-direction: column; gap: 16px; }
.svc-card {
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 30px 32px;
  display: flex; flex-direction: column; gap: 12px;
  transition: border-color .2s ease, transform .2s ease;
}
.svc-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.svc-card.big { min-height: 296px; }
.svc-card .no {
  font-family: var(--ff-num); font-size: 42px; line-height: 1; color: var(--accent);
}
.svc-card h3 { font-size: 26px; font-weight: 700; color: var(--ink); }
.svc-card p { font-size: 14px; line-height: 1.85; color: var(--ink-2); }
.svc-card .tags {
  margin-top: auto;
  font-size: 12px; font-weight: 500; color: var(--accent); letter-spacing: .5px;
}
.svc-strip { min-height: 192px; }

/* ============================================================
   WORKS BENTO
   ============================================================ */
.works-bento { display: grid; grid-template-columns: 760px 1fr; gap: 16px; }
.works-col { display: flex; flex-direction: column; gap: 16px; }
.work-figure {
  position: relative; overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}
.work-figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.work-figure:hover img { transform: scale(1.04); }
.work-figure.main { height: 440px; }
.work-figure.side { height: 212px; }
.work-caption { margin-top: 8px; }
.work-caption .t { font-size: 22px; font-weight: 700; color: var(--ink); }
.work-caption .d { font-size: 14px; line-height: 1.7; color: var(--ink-2); margin-top: 4px; }
.work-side-cap {
  margin-top: 10px; font-size: 13px; font-weight: 500; color: var(--ink-3);
}
.work-tags {
  margin-top: 14px; font-size: 13px; color: var(--ink-4); letter-spacing: .5px;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about { display: grid; grid-template-columns: 620px 1fr; gap: 60px; align-items: center; }
.about-text { display: flex; flex-direction: column; gap: 20px; }
.about-text h2 { font-size: 42px; font-weight: 900; line-height: 1.38; letter-spacing: -.5px; }
.about-text p.body { font-size: 16px; line-height: 1.9; color: var(--ink-2); }
.about-text .sub-h { font-size: 14px; font-weight: 700; color: var(--accent); }
.about-text .qual { font-size: 14px; line-height: 1.9; color: #D3D7DE; white-space: pre-line; }
.about-media { position: relative; height: 520px; background: var(--panel); overflow: hidden; border-radius: var(--radius); }
.about-media img { width: 100%; height: 100%; object-fit: cover; }
.about-badge {
  position: absolute; left: 32px; bottom: 28px;
  background: rgba(18, 22, 28, .92); border: 1px solid var(--line-strong);
  padding: 14px 18px; display: flex; flex-direction: column; gap: 5px;
}
.about-badge .eyebrow { margin-bottom: 0; }
.about-badge h4 { font-size: 15px; font-weight: 700; color: var(--ink); }

/* ============================================================
   PROCESS
   ============================================================ */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); }
.step {
  padding: 36px 28px;
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 12px;
}
.step:last-child { border-right: none; }
.step .no { font-family: var(--ff-num); font-size: 56px; line-height: 1; color: var(--accent); }
.step h4 { font-size: 20px; font-weight: 700; color: var(--ink); }
.step p { font-size: 14px; line-height: 1.7; color: var(--ink-2); }

/* ============================================================
   CLIENTS
   ============================================================ */
.clients-rows { display: flex; flex-direction: column; gap: 26px; margin-top: 8px; }
.client-row {
  font-size: 20px; font-weight: 500; letter-spacing: 1px; color: #9AA2AE;
}
.client-note { font-size: 11px; color: var(--ink-5); margin-top: 8px; }

/* ============================================================
   NEWS
   ============================================================ */
.news-list { border-top: 1px solid var(--line); }
.news-item {
  display: flex; align-items: center; gap: 40px;
  padding: 22px 0; border-bottom: 1px solid var(--line);
  transition: background .15s ease;
}
.news-item:hover { background: rgba(255,255,255,.02); }
.news-item .meta {
  width: 230px; flex: none;
  font-family: var(--ff-en); font-weight: 700; font-size: 13px;
  letter-spacing: 1px; color: var(--accent);
}
.news-item .t { font-size: 18px; font-weight: 500; color: var(--ink); }
.news-note { font-size: 11px; color: var(--ink-5); margin-top: 12px; }

/* ============================================================
   FAQ
   ============================================================ */
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 48px; }
.faq-item { border-bottom: 1px solid var(--line); padding-bottom: 26px; }
.faq-item .q { font-size: 19px; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
.faq-item .a { font-size: 14px; line-height: 1.85; color: var(--ink-2); }

/* ============================================================
   CTA — 深底 + 顶部一束舞台光
   ============================================================ */
.cta {
  position: relative;
  overflow: hidden;
  background: var(--bg-alt);
  padding: 110px 60px;
  display: flex; flex-direction: column; gap: 26px; align-items: flex-start;
  border-top: 1px solid var(--line);
}
.cta::before {
  content: "";
  position: absolute; top: -240px; left: 50%; transform: translateX(-50%);
  width: 820px; height: 520px;
  background: radial-gradient(ellipse at center, rgba(232,117,44,0.18), rgba(232,117,44,0) 68%);
  pointer-events: none;
}
.cta-inner { position: relative; max-width: 920px; }
.cta .eyebrow { color: var(--accent); }
.cta h2 { font-size: 46px; font-weight: 900; line-height: 1.3; letter-spacing: -.5px; color: var(--ink); max-width: 900px; margin-top: 6px; }
.cta .sub { font-size: 17px; font-weight: 500; line-height: 1.8; color: var(--ink-2); max-width: 720px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; position: relative; }
.cta-info { font-size: 13px; color: var(--ink-3); letter-spacing: .3px; position: relative; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: #080A0D; padding: 64px 60px 28px; }
.footer-big {
  font-family: var(--ff-num); font-size: 112px; line-height: 1;
  letter-spacing: 3px; color: var(--brand-big); margin-bottom: 44px;
}
.footer-cols { display: grid; grid-template-columns: 400px 1fr 1fr 1fr; gap: 56px; }
.footer-col h4 { font-size: 13px; font-weight: 700; color: var(--accent); margin-bottom: 14px; }
.footer-brand .cn { font-size: 20px; font-weight: 900; color: var(--ink); margin-bottom: 14px; }
.footer-brand p { font-size: 13px; line-height: 1.7; color: var(--ink-3); white-space: pre-line; }
.footer-col a, .footer-col p { display: block; font-size: 14px; line-height: 1.9; color: var(--ink-2); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 40px; padding-top: 24px; border-top: 1px solid #1C222A;
  font-size: 12px; color: var(--ink-5);
}
.footer-bottom a { color: var(--ink-5); }
.footer-bottom a:hover { color: var(--accent); }
/* 备案信息：两个链接 + 公安徽标 */
.footer-bottom .beian-group { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; }
.footer-bottom .beian-group a { display: inline-flex; align-items: center; gap: 6px; transition: color .15s ease; }
.footer-bottom .beian-group a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.footer-bottom .beian-group img { width: 18px; height: 18px; display: block; flex: none; }

/* ============================================================
   内页页头
   ============================================================ */
.page-hero {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 60px;
  padding: 84px 60px;
  background: var(--bg-alt);
}
.page-hero .crumb {
  font-family: var(--ff-en); font-weight: 700; font-size: 13px;
  letter-spacing: 1.6px; color: var(--accent); margin-bottom: 20px;
}
.page-hero h1 { font-size: 64px; font-weight: 900; letter-spacing: -1px; line-height: 1.2; color: var(--ink); }
.page-hero .sub { margin-top: 18px; font-size: 17px; line-height: 1.85; color: var(--ink-2); white-space: pre-line; max-width: 780px; }
.page-hero .ph-no { font-family: var(--ff-num); font-size: 150px; line-height: .93; color: var(--brand-big); }
.page-hero .ph-meta { font-family: var(--ff-en); font-weight: 700; font-size: 12px; letter-spacing: 2px; color: var(--accent); }

/* 服务详情图文 */
.svc-detail { display: grid; grid-template-columns: 620px 1fr; gap: 60px; align-items: center; padding: 90px 60px; }
.svc-detail.reverse .svc-detail-text { order: 2; }
.svc-detail-text { display: flex; flex-direction: column; gap: 18px; }
.svc-detail-text .no { font-family: var(--ff-en); font-weight: 700; font-size: 13px; letter-spacing: 2px; color: var(--accent); }
.svc-detail-text h2 { font-size: 38px; font-weight: 900; letter-spacing: -.5px; color: var(--ink); }
.svc-detail-text p { font-size: 16px; line-height: 1.9; color: var(--ink-2); }
.svc-detail-text .list { font-size: 14px; font-weight: 500; line-height: 2; color: #D3D7DE; white-space: pre-line; }
.svc-detail-media { height: 400px; background: var(--panel); overflow: hidden; border-radius: var(--radius); }
.svc-detail-media img { width: 100%; height: 100%; object-fit: cover; }

/* 设备清单表 */
.inv { padding: 100px 60px; background: var(--bg-alt); }
.inv-table { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.inv-row {
  display: grid; grid-template-columns: 190px 1fr;
  align-items: center; gap: 24px;
  padding: 18px 20px; border-bottom: 1px solid var(--line);
}
.inv-row:last-child { border-bottom: none; }
.inv-row .cat { font-size: 16px; font-weight: 700; color: var(--accent); }
.inv-row .items { font-size: 15px; color: #D3D7DE; }
.inv-safe { background: var(--bg); padding: 30px 60px; display: flex; gap: 40px; }
.inv-safe .safe-t { font-size: 17px; font-weight: 700; color: var(--ink); }

/* 案例作品栅格 */
.case-grid { display: flex; flex-direction: column; gap: 16px; padding: 70px 60px 90px; }
.case-row { display: grid; gap: 16px; }
.case-row.r1 { grid-template-columns: 860px 1fr; }
.case-row.r2 { grid-template-columns: repeat(3, 1fr); }
.case-row.r3 { grid-template-columns: 1fr; }
.case-fig {
  position: relative; overflow: hidden; background: var(--panel);
  border: 1px solid var(--line-strong); border-radius: var(--radius);
}
.case-fig img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.case-fig:hover img { transform: scale(1.04); }
.case-fig.h420 { height: 420px; }
.case-fig.h250 { height: 250px; }
.case-fig.h300 { height: 300px; }
.case-cap { margin-top: 12px; font-size: 14px; font-weight: 500; color: var(--ink-2); }
.case-index { margin-top: 14px; font-size: 13px; font-weight: 500; color: var(--ink-3); }

/* 项目切片 / 场景 */
.feature { padding: 90px 60px; background: var(--bg-alt); display: flex; flex-direction: column; gap: 32px; }
.feature .f-desc { font-size: 16px; line-height: 1.9; color: var(--ink-2); max-width: 820px; }
.f-nums { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); }
.f-num { padding: 30px; border-right: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; }
.f-num:last-child { border-right: none; }
.f-num .n { font-family: var(--ff-num); font-size: 56px; line-height: 1; color: var(--ink); }
.f-num:nth-child(2) .n { color: var(--accent); }
.f-num .l { font-size: 13px; color: var(--ink-3); }
.scene { padding: 80px 60px 90px; background: var(--bg); display: flex; flex-direction: column; gap: 24px; }
.scene .s-list { font-size: 18px; font-weight: 500; line-height: 2.1; color: var(--ink-2); }

/* filter tabs */
.filter-tabs { display: flex; gap: 12px; flex-wrap: wrap; }
.filter-tab {
  font-size: 14px; font-weight: 500; color: var(--ink-2);
  padding: 8px 18px; border: 1px solid var(--line-strong); border-radius: 2px;
  background: var(--panel); transition: .15s;
}
.filter-tab.active, .filter-tab:hover { color: var(--bg); background: var(--accent); border-color: var(--accent); }

/* 回到顶部 */
.to-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 90;
  width: 46px; height: 46px; border-radius: 2px;
  background: var(--accent); color: var(--bg);
  border: none; display: none; align-items: center; justify-content: center;
  font-size: 20px; transition: .2s;
}
.to-top.show { display: flex; }
.to-top:hover { background: var(--accent-soft); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1200px) {
  :root { --pad: 40px; }
  .bento, .works-bento, .about, .svc-detail, .case-row.r1 { grid-template-columns: 1fr; }
  .hero { grid-template-columns: 1fr; }
  .hero-right { min-height: 420px; }
  .footer-cols { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer-big { font-size: 84px; }
}
@media (max-width: 860px) {
  .nav, .header-tel { display: none; }
  .nav-toggle { display: flex; }
  .nav.open {
    display: flex; flex-direction: column; gap: 4px;
    position: absolute; top: var(--header-h); left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 16px var(--pad);
  }
  .nav.open .nav-link { padding: 12px 0; font-size: 16px; }
  .section { padding: 72px 0; }
  .section-title { font-size: 32px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 16px; margin-bottom: 36px; }
  .hero h1 { font-size: 44px; }
  .hero-left { padding: 72px 40px 48px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(2) { border-right: none; }
  .stat:nth-child(1), .stat:nth-child(2) { border-bottom: 1px solid var(--line); }
  .steps { grid-template-columns: 1fr 1fr; }
  .step:nth-child(2) { border-right: none; }
  .faq-grid { grid-template-columns: 1fr; gap: 0; }
  .cta { padding: 64px 40px; }
  .cta h2 { font-size: 32px; }
  .page-hero { flex-direction: column; align-items: flex-start; padding: 56px 40px; gap: 24px; }
  .page-hero h1 { font-size: 42px; }
  .page-hero .ph-no { font-size: 96px; }
  .svc-detail { grid-template-columns: 1fr; padding: 60px 40px; }
  .svc-detail.reverse .svc-detail-text { order: 0; }
  .footer-cols { grid-template-columns: 1fr; gap: 32px; }
  .footer-big { font-size: 56px; }
  .footer-bottom { flex-direction: column; gap: 10px; align-items: flex-start; }
  .footer-bottom .beian-group { flex-direction: column; align-items: flex-start; gap: 8px; }
  .case-row.r2 { grid-template-columns: 1fr; }
  .f-nums { grid-template-columns: 1fr 1fr; }
  .ticker { flex-direction: column; gap: 4px; height: auto; padding: 12px 40px; text-align: center; }
  .news-item { flex-direction: column; gap: 8px; align-items: flex-start; }
  .news-item .meta { width: auto; }
}
@media (max-width: 480px) {
  .stats, .steps, .f-nums { grid-template-columns: 1fr; }
  .stat, .step, .f-num { border-right: none; border-bottom: 1px solid var(--line); }
}

/* ============================================================
   内容页组件（第二轮完善）
   ============================================================ */
[hidden] { display: none !important; }
.cta-more {
  position: relative; z-index: 1;
  font-size: 13px; font-weight: 700; letter-spacing: .5px;
  color: var(--accent); border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}
.cta-more:hover { color: var(--accent-soft); }
.ph-side { text-align: right; flex: none; }

/* 业务线概览 */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.biz-card {
  background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius);
  padding: 26px 22px; display: flex; flex-direction: column; gap: 10px;
  transition: border-color .2s ease, transform .2s ease;
}
.biz-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.biz-card .no { font-family: var(--ff-num); font-size: 38px; line-height: 1; color: var(--accent); }
.biz-card h3 { font-size: 18px; font-weight: 700; color: var(--ink); }
.biz-card p { font-size: 13px; line-height: 1.8; color: var(--ink-2); }
.biz-card .tags { margin-top: auto; font-size: 11px; font-weight: 500; color: var(--accent); line-height: 1.6; }

/* 补充业务线清单卡 */
.svc-extra { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.extra-card {
  background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius);
  padding: 34px 36px; display: flex; flex-direction: column; gap: 14px;
}
.extra-card .no { font-family: var(--ff-en); font-weight: 700; font-size: 13px; letter-spacing: 2px; color: var(--accent); }
.extra-card h3 { font-size: 26px; font-weight: 900; color: var(--ink); }
.extra-card > p:not(.no) { font-size: 15px; line-height: 1.9; color: var(--ink-2); }
.check-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 20px; margin-top: 6px; }
.check-list li { position: relative; padding-left: 20px; font-size: 14px; color: #D3D7DE; }
.check-list li::before { content: ""; position: absolute; left: 0; top: .55em; width: 8px; height: 8px; background: var(--accent); }

/* 交付物 */
.deliver-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.deliver-card { background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 30px 26px; display: flex; flex-direction: column; gap: 12px; }
.deliver-card .no { font-family: var(--ff-num); font-size: 40px; line-height: 1; color: var(--accent); }
.deliver-card h4 { font-size: 18px; font-weight: 700; color: var(--ink); }
.deliver-card p { font-size: 13px; line-height: 1.85; color: var(--ink-2); }

/* 能力矩阵 / 三条规矩 */
.cap-grid, .rule-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cap-card { background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 28px 26px; display: flex; flex-direction: column; gap: 10px; }
.cap-card .no { font-family: var(--ff-num); font-size: 34px; line-height: 1; color: var(--accent); }
.cap-card h4 { font-size: 19px; font-weight: 700; color: var(--ink); }
.cap-card p { font-size: 13px; line-height: 1.85; color: var(--ink-2); }
.rule-card { border: 1px solid var(--line); padding: 30px 28px; display: flex; flex-direction: column; gap: 12px; }
.rule-card .no { font-family: var(--ff-num); font-size: 42px; line-height: 1; color: var(--accent); }
.rule-card h4 { font-size: 20px; font-weight: 700; color: var(--ink); }
.rule-card p { font-size: 14px; line-height: 1.85; color: var(--ink-2); }

/* 案例卡栅格 */
.case-wrap {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  padding: 70px 60px 0; align-items: start;
}
.case-item { background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); overflow: hidden; }
.case-item.wide { grid-column: 1 / -1; }
.case-wrap.filtered .case-item.wide { grid-column: auto; }
.case-media { height: 240px; overflow: hidden; background: var(--panel); }
.case-item.wide .case-media { height: 420px; }
.case-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.case-item:hover .case-media img { transform: scale(1.04); }
.case-body { padding: 24px 26px 28px; display: flex; flex-direction: column; gap: 8px; }
.case-no { font-family: var(--ff-num); font-size: 30px; line-height: 1; color: var(--accent); }
.case-tag { font-family: var(--ff-en); font-weight: 700; font-size: 12px; letter-spacing: 1.4px; color: var(--accent); }
.case-body h3 { font-size: 21px; font-weight: 700; color: var(--ink); }
.case-body p { font-size: 14px; line-height: 1.8; color: var(--ink-2); }
.case-empty { grid-column: 1 / -1; padding: 40px 0; font-size: 14px; color: var(--ink-3); }
.case-note { padding: 14px 60px 80px; font-size: 11px; color: var(--ink-5); background: var(--bg); }

/* 新闻重点动态 / 折叠列表 */
.news-feature { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.news-feature-media { height: 380px; overflow: hidden; background: var(--panel); border-radius: var(--radius); }
.news-feature-media img { width: 100%; height: 100%; object-fit: cover; }
.news-feature-text { display: flex; flex-direction: column; gap: 16px; }
.news-feature-text .news-meta { font-family: var(--ff-en); font-weight: 700; font-size: 13px; letter-spacing: 1.2px; color: var(--accent); }
.news-feature-text h2 { font-size: 32px; font-weight: 900; line-height: 1.35; color: var(--ink); }
.news-feature-text p:not(.eyebrow):not(.news-meta) { font-size: 15px; line-height: 1.9; color: var(--ink-2); }
details.news-item { display: block; }
details.news-item > summary {
  display: flex; align-items: center; gap: 40px;
  padding: 22px 0; cursor: pointer; list-style: none;
}
details.news-item > summary::-webkit-details-marker { display: none; }
.news-item .plus { margin-left: auto; font-size: 22px; line-height: 1; color: var(--accent); transition: transform .2s ease; }
details.news-item[open] .plus { transform: rotate(45deg); }
.news-body { padding: 0 0 24px; }
.news-body p { font-size: 14px; line-height: 1.9; color: var(--ink-2); max-width: 820px; }

/* 联系信息 / 报价清单 */
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.contact-card { background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 28px 26px; display: flex; flex-direction: column; gap: 12px; }
.contact-card .lab { font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--accent); }
.contact-card .val { font-size: 22px; font-weight: 700; color: var(--ink); line-height: 1.4; word-break: break-word; }
.contact-card .val-sm { font-size: 17px; }
.contact-card .val:hover { color: var(--accent); }
.contact-card p { font-size: 12px; line-height: 1.7; color: var(--ink-3); }
.quote-checklist { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; border-top: 1px solid var(--line); }
.quote-item {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 20px 8px; border-bottom: 1px solid var(--line); cursor: pointer;
}
.quote-item input { position: absolute; opacity: 0; width: 0; height: 0; }
.quote-item .box {
  flex: none; width: 20px; height: 20px; margin-top: 3px;
  border: 1px solid var(--line-strong); border-radius: 2px; background: var(--panel);
  position: relative; transition: .15s;
}
.quote-item input:checked + .box { background: var(--accent); border-color: var(--accent); }
.quote-item input:checked + .box::after { content: "✓"; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; color: var(--bg); }
.quote-item input:focus-visible + .box { outline: 2px solid var(--accent); outline-offset: 2px; }
.qc-text { display: flex; flex-direction: column; gap: 4px; }
.qc-text strong { font-size: 16px; font-weight: 700; color: var(--ink); }
.qc-text em { font-style: normal; font-size: 13px; line-height: 1.8; color: var(--ink-2); }
.quote-note { margin-top: 16px; font-size: 11px; color: var(--ink-5); }

/* 新组件的中屏降级（平板） */
@media (max-width: 1200px) {
  .biz-grid { grid-template-columns: repeat(3, 1fr); }
  .deliver-grid, .contact-grid { grid-template-columns: 1fr 1fr; }
  .cap-grid, .rule-grid { grid-template-columns: 1fr 1fr; }
  .news-feature { gap: 32px; }
}

/* ============================================================
   手机端深度适配（覆盖式，不动桌面布局）
   ============================================================ */
@media (max-width: 860px) {
  body { overflow-wrap: break-word; }
  /* 页头筛选条：约束宽度，避免 nowrap 按钮把整页撑出横向滚动 */
  .page-hero { align-items: stretch; }
  .page-hero > div:first-child { width: 100%; min-width: 0; max-width: 100%; }
  .filter-tabs { width: 100%; max-width: 100%; min-width: 0; }
  .biz-grid, .svc-extra, .deliver-grid, .cap-grid, .rule-grid,
  .contact-grid, .quote-checklist, .news-feature, .case-wrap { grid-template-columns: 1fr; }
  .news-feature-media { height: 240px; }
  .case-item.wide .case-media { height: 280px; }
  .case-media { height: 210px; }
  .case-wrap, .case-note { padding-left: var(--pad); padding-right: var(--pad); }
  .case-note { padding-bottom: 56px; }
  .case-wrap { padding-top: 48px; }
  .biz-grid { grid-template-columns: 1fr 1fr; }
  .biz-card:last-child { grid-column: 1 / -1; }
  .biz-card { padding: 20px 18px; }
  .biz-card h3 { font-size: 16px; }
  .biz-card .no { font-size: 32px; }
  .deliver-grid, .cap-grid, .rule-grid, .contact-grid { grid-template-columns: 1fr 1fr; }
  .check-list { grid-template-columns: 1fr 1fr; gap: 8px 12px; }
  .extra-card { padding: 26px 24px; }
  .svc-detail { padding: 48px var(--pad); gap: 28px; }
  .svc-detail-media { height: 220px; }
  .svc-detail-text h2 { font-size: 28px; }
  .svc-detail-text p { font-size: 15px; }
  .inv { padding: 64px var(--pad); }
  .inv-row { grid-template-columns: 1fr; gap: 6px; padding: 16px 18px; }
  .inv-row .items { font-size: 14px; line-height: 1.7; }
  .inv-safe { padding: 24px var(--pad); }
  .inv-safe .safe-t { font-size: 14px; line-height: 1.8; }
  .feature, .scene { padding: 64px var(--pad); }
  .feature .f-desc { font-size: 15px; }
  .scene .s-list { font-size: 16px; line-height: 2; }
  .filter-tabs { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 6px; scrollbar-width: none; }
  .filter-tabs::-webkit-scrollbar { display: none; }
  .filter-tab { flex: none; white-space: nowrap; min-height: 40px; }
  .page-hero .ph-no { font-size: 84px; line-height: 1; }
  .ph-side { text-align: left; }
  .cta-info { line-height: 1.9; }
  .cta-actions .btn { flex: 1 1 auto; min-width: 150px; }
  .to-top { right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); width: 44px; height: 44px; }
  .site-footer { padding-bottom: calc(28px + env(safe-area-inset-bottom)); }
  details.news-item > summary { gap: 12px; padding: 18px 0; flex-wrap: wrap; }
  details.news-item > summary .meta { width: 100%; font-size: 12px; }
  details.news-item > summary .t { font-size: 16px; flex: 1; }
  .news-item .plus { font-size: 20px; }
  .news-feature-text h2 { font-size: 26px; }
  .nav.open { max-height: calc(100vh - var(--header-h)); overflow-y: auto; }
  .nav.open .nav-link { min-height: 44px; display: flex; align-items: center; }
}
@media (max-width: 480px) {
  /* 头部：手机端去掉主按钮，只留品牌 + 汉堡，避免按钮被挤成竖排文字 */
  .header-actions .btn-primary { display: none; }
  .brand-en { white-space: nowrap; font-size: 9px; letter-spacing: 1.1px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  /* 覆盖旧断点：数据/流程保持双列紧凑，避免手机端拉得过长 */
  .stats, .steps, .f-nums { grid-template-columns: 1fr 1fr; }
  .stat, .step, .f-num { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .stat:nth-child(2n), .step:nth-child(2n), .f-num:nth-child(2n) { border-right: none; }
  .stat:nth-last-child(-n+2), .step:nth-last-child(-n+2), .f-num:nth-last-child(-n+2) { border-bottom: none; }
  .stat { padding: 26px 20px; }
  .stat .num { font-size: 42px; }
  .stat .lab { font-size: 12px; }
  .step, .f-num { padding: 22px 18px; }
  .step .no, .f-num .n { font-size: 42px; }
  .step h4 { font-size: 17px; }
  .step p { font-size: 13px; }
  .section { padding: 56px 0; }
  .section-title { font-size: 27px; }
  .section-sub { font-size: 14px; }
  .section-head { margin-bottom: 28px; }
  .hero-left { padding: 56px 24px 40px; gap: 20px; }
  .hero h1 { font-size: 36px; line-height: 1.3; }
  .hero-sub { font-size: 15px; }
  .hero-params { font-size: 11px; line-height: 1.8; }
  .hero-right { min-height: 300px; }
  .hero-info { left: 16px; bottom: 16px; width: calc(100% - 32px); padding: 12px 14px; }
  .hero-info h4 { font-size: 15px; }
  .ticker { padding: 12px 24px; }
  .ticker .t-services { font-size: 12px; line-height: 1.6; }
  .ticker .t-brand { font-size: 12px; }
  .stats-note { padding: 12px 24px; }
  /* 首页服务栅格：大卡单列、右列条卡双列紧凑 */
  .bento { gap: 12px; }
  .bento-col { gap: 12px; }
  .bento-col:nth-child(2) { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .bento-col:nth-child(2) .svc-card:last-child { grid-column: 1 / -1; }
  .svc-card { padding: 22px 20px; gap: 8px; }
  .svc-card.big { min-height: 0; }
  .svc-card .no { font-size: 30px; }
  .svc-card h3 { font-size: 20px; }
  .svc-card p { font-size: 13px; line-height: 1.7; }
  .svc-card .tags { font-size: 11px; line-height: 1.6; }
  .svc-strip { min-height: 0; }
  .bento-col:nth-child(2) .svc-card h3 { font-size: 16px; }
  .bento-col:nth-child(2) .svc-card .no { font-size: 24px; }
  .bento-col:nth-child(2) .svc-card p { font-size: 12px; line-height: 1.65; }
  /* 首页案例 bento：主图单列、副图双列 */
  .works-bento { gap: 12px; }
  .works-col { gap: 12px; }
  .works-col:nth-child(2) { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .work-figure.main { height: 260px; }
  .work-figure.side { height: 130px; }
  .works-col:nth-child(2) .work-figure { grid-row: 1; height: 130px; }
  .works-col:nth-child(2) .work-side-cap { grid-row: 2; font-size: 11px; line-height: 1.5; }
  .work-caption .t { font-size: 18px; }
  .work-caption .d { font-size: 13px; }
  .about { gap: 28px; }
  .about-text h2 { font-size: 28px; }
  .about-media { height: 280px; }
  .about-badge { left: 16px; bottom: 16px; padding: 12px 14px; }
  .about-badge h4 { font-size: 13px; }
  .faq-item .q { font-size: 17px; }
  .news-item { padding: 18px 0; }
  .news-item .t { font-size: 16px; }
  .cta { padding: 56px 24px; gap: 20px; }
  .cta h2 { font-size: 27px; line-height: 1.35; }
  .cta .sub { font-size: 15px; }
  .cta-info { font-size: 12px; }
  .page-hero { padding: 44px 24px; }
  .page-hero h1 { font-size: 34px; }
  .page-hero .sub { font-size: 14px; }
  .page-hero .ph-no { font-size: 64px; }
  .site-footer { padding: 48px 24px 24px; }
  .footer-big { font-size: 44px; letter-spacing: 1px; margin-bottom: 32px; }
  .footer-cols { gap: 26px; }
  .footer-bottom { font-size: 11px; line-height: 1.8; }
  .clients-rows { gap: 16px; }
  .client-row { font-size: 15px; line-height: 1.9; }
  /* 卡片保持双列紧凑，避免手机端拉成很长的单列 */
  .biz-grid, .deliver-grid, .cap-grid, .rule-grid, .contact-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .biz-card:last-child { grid-column: 1 / -1; }
  .check-list { grid-template-columns: 1fr; }
  .biz-card, .deliver-card, .cap-card, .rule-card, .contact-card { padding: 18px 16px; gap: 8px; }
  .biz-card .no, .cap-card .no, .deliver-card .no, .rule-card .no { font-size: 26px; }
  .biz-card h3 { font-size: 15px; }
  .cap-card h4, .rule-card h4, .deliver-card h4 { font-size: 15px; }
  .biz-card p, .cap-card p, .deliver-card p, .rule-card p { font-size: 12px; line-height: 1.65; }
  .contact-card .val { font-size: 15px; }
  .contact-card .val-sm { font-size: 13px; }
  .contact-card .lab, .contact-card p { font-size: 11px; }
  /* 筛选标签收紧，让首屏能完整露出前几个 */
  .filter-tabs { gap: 8px; }
  .filter-tab { padding: 8px 12px; font-size: 12px; min-height: 38px; }
  /* 舞台光在窄屏收窄变淡，避免变成一整条棕色带 */
  .cta::before {
    width: 420px; height: 320px; top: -180px;
    background: radial-gradient(ellipse at center, rgba(232,117,44,0.14), rgba(232,117,44,0) 70%);
  }
  .quote-item { padding: 16px 4px; }
  .case-wrap { padding-top: 40px; }
  .case-body { padding: 20px 20px 24px; }
  .case-body h3 { font-size: 18px; }
}


/* ============================================================
   全站内容基准线统一（修复 >1440px 宽屏错位）
   .container 与所有全宽区块共用同一左右基准，背景仍整屏铺满
   ============================================================ */
:root {
  --gutter: max(var(--pad), calc((100% - var(--maxw)) / 2 + var(--pad)));
}
@media (max-width: 480px) { :root { --pad: 24px; } }

.hero, .ticker, .stats, .stats-note, .cta, .site-footer,
.page-hero, .svc-detail, .inv, .inv-safe, .case-wrap, .case-note,
.feature, .scene {
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.hero-left { padding-left: 0; padding-right: 40px; }
.stat:first-child { padding-left: 0; }
.stat:last-child { padding-right: 0; }


/* ============================================================
   六条业务线对称栅格 + 合作客户 Logo 墙
   ============================================================ */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.svc-grid .svc-card { min-height: 280px; }
.svc-grid .svc-card p { flex: 1; }

.clients-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; margin-top: 8px;
}
.client-logo {
  background: var(--bg-alt);
  min-height: 132px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 12px;
  padding: 24px 20px;
  transition: background .2s ease;
}
.client-logo:hover { background: var(--panel); }
.client-logo img {
  max-width: 180px; max-height: 56px; width: auto; height: auto;
  object-fit: contain;
  filter: grayscale(1) brightness(1.9) contrast(.9);
  opacity: .82;
}
.client-logo:hover img { filter: none; opacity: 1; }
.client-logo span { font-size: 12px; letter-spacing: .5px; color: var(--ink-4); }

@media (max-width: 1200px) {
  .svc-grid { grid-template-columns: repeat(2, 1fr); }
  .biz-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 860px) {
  .svc-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .svc-grid .svc-card { min-height: 0; padding: 22px 18px; gap: 8px; }
  .svc-grid .svc-card .no { font-size: 30px; }
  .svc-grid .svc-card h3 { font-size: 17px; }
  .svc-grid .svc-card p { font-size: 12px; line-height: 1.65; }
  .svc-grid .svc-card .tags { font-size: 11px; line-height: 1.6; }
  .clients-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .svc-grid { grid-template-columns: 1fr; }
  .svc-grid .svc-card { padding: 20px 18px; }
  .clients-grid { grid-template-columns: 1fr 1fr; }
  .client-logo { min-height: 104px; padding: 18px 12px; }
  .client-logo img { max-width: 120px; max-height: 40px; }
  .client-logo span { font-size: 11px; }
}


/* 页脚地域服务词（SEO，弱化处理不抢视觉） */
.footer-seo { margin-top: 26px; font-size: 12px; line-height: 1.9; color: var(--ink-5); letter-spacing: .3px; }
@media (max-width: 480px) { .footer-seo { font-size: 11px; line-height: 1.8; margin-top: 20px; } }


/* 服务页补充业务线：中屏降为 2 列，手机单列 */
@media (min-width: 861px) and (max-width: 1200px) { .svc-extra { grid-template-columns: 1fr 1fr; } }