/* =========================================================
   杭州罗素科技有限公司 — 全站样式
   设计基调：参考 ievolstorm.com 的橙 / 灰白科技简约风
   ========================================================= */

:root {
  --orange: #ea580c;
  --orange-dark: #c2410c;
  --orange-light: #fff7ed;
  --orange-border: #fed7aa;
  --ink: #111827;
  --body: #4b5563;
  --muted: #9ca3af;
  --bg: #ffffff;
  --bg-soft: #f9fafb;
  --border: #e5e7eb;
  --shadow-sm: 0 1px 2px rgba(17, 24, 39, .05);
  --shadow: 0 4px 16px rgba(17, 24, 39, .08);
  --shadow-lg: 0 20px 40px rgba(17, 24, 39, .12);
  --radius: 14px;
  --max: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--body);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------- 顶部信息条 ---------- */
.topbar {
  background: var(--ink);
  color: #d1d5db;
  font-size: 13px;
}
.topbar .container {
  display: flex; justify-content: space-between; align-items: center;
  height: 36px;
}
.topbar a { color: #fdba74; }
.topbar a:hover { color: #fb923c; }

/* ---------- 主导航 ---------- */
.nav-wrap {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.brand-logo { display: flex; align-items: center; gap: 12px; }
.brand-logo img { height: 40px; width: auto; }
.brand-logo .fallback { display: none; }
.brand-logo.fallback .fallback { display: block; }
.brand-logo.fallback img { display: none; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 9px 15px; border-radius: 8px;
  font-size: 15px; font-weight: 500; color: #374151;
  transition: all .18s ease;
}
.nav-links a:hover { color: var(--orange); background: var(--orange-light); }
.nav-links a.active { color: var(--orange); background: var(--orange-light); }
.nav-links a.has-sub { position: relative; }

.nav-sub {
  position: absolute; top: 100%; left: 0; min-width: 210px;
  background: #fff; border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow-lg); padding: 8px; margin-top: 8px;
  display: none;
}
.nav-item { position: relative; }
.nav-item:hover .nav-sub { display: block; }
.nav-sub a {
  display: block; padding: 9px 12px; font-size: 14px;
  border-radius: 8px; color: var(--body);
}
.nav-sub a:hover { background: var(--orange-light); color: var(--orange); }

.nav-cta {
  background: var(--orange); color: #fff !important;
  padding: 10px 20px !important; border-radius: 10px !important;
  font-weight: 600 !important;
  box-shadow: 0 2px 8px rgba(234, 88, 12, .3);
}
.nav-cta:hover { background: var(--orange-dark) !important; }

.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 40px; height: 40px; border-radius: 8px;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 22px; height: 2px; background: var(--ink);
  position: relative; margin: 0 auto; transition: .2s;
}
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1100px 460px at 12% -10%, #ffedd5 0%, rgba(255, 237, 213, 0) 60%),
    radial-gradient(900px 420px at 92% 0%, #fde8e0 0%, rgba(253, 232, 224, 0) 55%),
    linear-gradient(180deg, #fff 0%, var(--bg-soft) 100%);
  border-bottom: 1px solid var(--border);
}
.hero-inner {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px;
  align-items: center; padding: 84px 0 76px;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--orange-border);
  color: var(--orange-dark); font-size: 13px; font-weight: 600;
  padding: 6px 14px; border-radius: 999px; margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}
.hero-badge i {
  width: 7px; height: 7px; border-radius: 50%; background: var(--orange);
  display: inline-block;
}
.hero h1 {
  font-size: 50px; line-height: 1.22; letter-spacing: -.5px;
  color: var(--ink); font-weight: 800; margin-bottom: 20px;
}
.hero h1 .accent { color: var(--orange); }
.hero p.lead {
  font-size: 18px; color: var(--body); max-width: 560px; margin-bottom: 30px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 11px; font-size: 15px; font-weight: 600;
  cursor: pointer; border: 1px solid transparent;
  transition: all .18s ease;
}
.btn-primary { background: var(--orange); color: #fff; box-shadow: 0 4px 14px rgba(234, 88, 12, .28); }
.btn-primary:hover { background: var(--orange-dark); transform: translateY(-1px); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--orange); color: var(--orange); }
.btn-sm { padding: 9px 18px; font-size: 14px; border-radius: 9px; }

.hero-visual {
  position: relative; border-radius: 20px; overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: linear-gradient(150deg, #1f2937 0%, #111827 100%);
  aspect-ratio: 4 / 3;
}
.hero-visual img { width: 100%; height: 100%; object-fit: cover; opacity: .94; }
.hero-slide {
  position: absolute; inset: 0; opacity: 0;
  transition: opacity .9s ease; pointer-events: none;
}
.hero-slide.is-active { opacity: 1; pointer-events: auto; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; opacity: .94; }
.hero-slide img.hero-fit {
  object-fit: contain; padding: 26px 40px 46px;
}
/* 白底产品图轮播：容器改白，图片不透明避免发灰 */
.hero-slide.slide-light { background: linear-gradient(150deg, #ffffff 0%, #f4f5f7 100%); }
.hero-slide.slide-light img { opacity: 1; }
.hero-cap {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 40px 18px 14px;
  background: linear-gradient(transparent, rgba(17,24,39,.86));
  color: #fff; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
}
.hero-cap b { font-size: 15px; }
.hero-cap span { font-size: 12.5px; color: rgba(255,255,255,.82); }
.hero-dots {
  position: absolute; right: 16px; bottom: 66px;
  display: flex; gap: 6px; z-index: 3;
}
.hero-dots i {
  width: 8px; height: 8px; border-radius: 4px;
  background: rgba(255,255,255,.45); cursor: pointer; transition: all .3s;
}
.hero-dots i.on { background: var(--orange); width: 20px; }
.hero-chip {
  position: absolute; background: rgba(255, 255, 255, .96);
  border-radius: 12px; padding: 11px 15px; box-shadow: var(--shadow);
  font-size: 13px; color: var(--ink); line-height: 1.4;
}
.hero-chip b { display: block; font-size: 17px; color: var(--orange); }
.hero-chip.c1 { left: 18px; bottom: 18px; }
.hero-chip.c2 { right: 18px; top: 18px; }

.hero-strip {
  border-top: 1px solid var(--border);
  background: #fff;
}
.hero-strip .container {
  display: flex; flex-wrap: wrap; gap: 12px 40px;
  align-items: center; justify-content: center; padding: 22px 24px;
}
.hero-strip span {
  font-size: 14px; color: #6b7280; font-weight: 600; letter-spacing: .5px;
}
.hero-strip span::before {
  content: ""; display: inline-block; width: 6px; height: 6px;
  border-radius: 50%; background: var(--orange); margin-right: 9px;
  vertical-align: middle;
}

/* ---------- 通用区块 ---------- */
section.block { padding: 84px 0; }
section.block.soft { background: var(--bg-soft); }
.block-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.block-head .eyebrow {
  display: inline-block; color: var(--orange); font-weight: 700;
  font-size: 13px; letter-spacing: 2.5px; text-transform: uppercase;
  margin-bottom: 12px;
}
.block-head h2 {
  font-size: 34px; color: var(--ink); font-weight: 800;
  letter-spacing: -.4px; margin-bottom: 14px; line-height: 1.3;
}
.block-head p { font-size: 16px; color: var(--body); }

/* ---------- 品牌卡 ---------- */
.brand-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.brand-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 24px; text-align: left; position: relative; overflow: hidden;
  transition: all .22s ease;
}
.brand-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 4px;
  background: var(--c, var(--orange)); opacity: 0; transition: .22s;
}
.brand-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: transparent; }
.brand-card:hover::before { opacity: 1; }
.brand-mark {
  width: 54px; height: 54px; border-radius: 13px;
  display: flex; align-items: center; justify-content: center;
  font-size: 21px; font-weight: 800; color: #fff;
  background: var(--c, var(--orange)); margin-bottom: 18px;
  letter-spacing: -1px;
}
.brand-mark.logo {
  background: none; border: none;
  width: auto; height: 52px;
  display: flex; align-items: center;
  margin-bottom: 18px;
}
.brand-mark.logo img {
  width: auto; max-width: 180px; height: 46px;
  object-fit: contain; object-position: left center;
  display: block;
}
.brand-mark.logo.tall img { height: 62px; }
.brand-card h3 { font-size: 19px; color: var(--ink); margin-bottom: 3px; font-weight: 700; }
.brand-card .en { font-size: 12.5px; color: var(--muted); letter-spacing: .4px; margin-bottom: 12px; }
.brand-card p { font-size: 14px; color: var(--body); line-height: 1.75; margin-bottom: 16px; }
.brand-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.brand-tags i {
  font-style: normal; font-size: 12px; color: var(--orange-dark);
  background: var(--orange-light); border: 1px solid var(--orange-border);
  padding: 3px 9px; border-radius: 6px;
}
.brand-card .more {
  font-size: 14px; font-weight: 600; color: var(--orange);
  display: inline-flex; align-items: center; gap: 5px;
}
.brand-card .more:hover { gap: 9px; }

/* ---------- 产品卡 ---------- */
.filter-bar {
  display: flex; flex-direction: column; align-items: flex-start; gap: 2px;
  margin-bottom: 40px;
}
.filter-row {
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-start;
  align-items: center; margin-bottom: 10px;
}
/* 三个分类标记词：全部（橙）· 按品牌（蓝）· 按品类（青） */
.filter-label {
  flex: 0 0 auto; font-size: 13px; font-weight: 700; letter-spacing: 1px;
  padding: 6px 14px; border-radius: 999px; user-select: none;
}
.filter-label.lb-brand { color: #1d4ed8; background: #eff6ff; border: 1px solid #bfdbfe; }
.filter-label.lb-cat { color: #0f766e; background: #ecfdf5; border: 1px solid #99f6e4; }
.chip {
  padding: 9px 18px; border-radius: 999px; font-size: 14px; font-weight: 600;
  background: #fff; border: 1px solid var(--border); color: var(--body);
  cursor: pointer; transition: all .18s;
}
.chip:hover { border-color: var(--orange); color: var(--orange); }
.chip.on { background: var(--orange); border-color: var(--orange); color: #fff; box-shadow: 0 2px 10px rgba(234, 88, 12, .25); }
/* 「全部」常驻橙色标记，选中时变实心 */
.chip.all { border-color: #fed7aa; background: #fff7ed; color: #c2410c; }
.chip.all:hover { border-color: var(--orange); color: var(--orange); }
.chip.all.on { background: var(--orange); border-color: var(--orange); color: #fff; box-shadow: 0 2px 10px rgba(234, 88, 12, .25); }

.product-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.p-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  transition: all .22s ease;
}
.p-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: transparent; }
.p-thumb {
  aspect-ratio: 4 / 3; background: #fff; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center; padding: 16px;
  overflow: hidden;
}
.p-thumb img {
  max-height: 100%; max-width: 100%; width: auto; height: auto;
  object-fit: contain; transition: transform .35s ease;
}
.p-card:hover .p-thumb img { transform: scale(1.05); }
.p-body { padding: 18px 20px 20px; flex: 1; display: flex; flex-direction: column; }
.p-brand {
  font-size: 12px; font-weight: 700; letter-spacing: .5px;
  color: var(--b, var(--orange)); margin-bottom: 7px;
}
.p-body h3 { font-size: 17px; color: var(--ink); font-weight: 700; line-height: 1.35; }
.p-body .sub { font-size: 13.5px; color: var(--body); margin-top: 4px; }
.p-body .desc {
  font-size: 13.5px; color: #6b7280; margin-top: 11px;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.p-foot { margin-top: auto; padding-top: 15px; display: flex; align-items: center; justify-content: space-between; }
.p-cat {
  font-size: 12px; color: var(--muted); background: var(--bg-soft);
  padding: 3px 9px; border-radius: 6px; border: 1px solid var(--border);
}
.p-foot .go { font-size: 13.5px; font-weight: 700; color: var(--orange); }

/* ---------- 数据统计 ---------- */
.stats-band { background: var(--ink); color: #fff; padding: 56px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat b {
  display: block; font-size: 42px; font-weight: 800; color: #fb923c;
  letter-spacing: -1px; line-height: 1.1;
}
.stat span { font-size: 14px; color: #9ca3af; margin-top: 6px; display: block; }

/* ---------- 优势 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.adv {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 24px; transition: all .22s;
}
.adv:hover { box-shadow: var(--shadow); border-color: var(--orange-border); }
.adv .ico {
  width: 46px; height: 46px; border-radius: 12px; background: var(--orange-light);
  color: var(--orange); display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px; font-size: 22px;
}
.adv h3 { font-size: 17px; color: var(--ink); margin-bottom: 9px; font-weight: 700; }
.adv p { font-size: 14px; color: var(--body); }

/* ---------- 应用领域 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.app {
  border-radius: var(--radius); padding: 26px 24px; color: #fff;
  position: relative; overflow: hidden; min-height: 150px;
  display: flex; flex-direction: column; justify-content: flex-end;
  background: linear-gradient(140deg, #1f2937, #111827);
  transition: transform .22s;
}
.app:hover { transform: translateY(-4px); }
.app::after {
  content: ""; position: absolute; right: -30px; top: -30px;
  width: 120px; height: 120px; border-radius: 50%;
  background: rgba(234, 88, 12, .25); filter: blur(28px);
}
.app h3 { font-size: 18px; font-weight: 700; position: relative; }
.app p { font-size: 13.5px; opacity: .8; margin-top: 5px; position: relative; }

/* ---------- 服务 ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.svc {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 28px;
}
.svc h3 { font-size: 19px; color: var(--ink); font-weight: 700; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.svc h3::before {
  content: ""; width: 4px; height: 20px; border-radius: 2px; background: var(--orange);
}
.svc p { font-size: 14.5px; margin-bottom: 14px; }
.svc ul li {
  font-size: 14px; color: #374151; padding: 6px 0 6px 22px; position: relative;
}
.svc ul li::before {
  content: "✓"; position: absolute; left: 0; color: var(--orange); font-weight: 700;
}

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 24px; transition: all .22s; display: flex; flex-direction: column;
}
.news-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.news-meta { display: flex; gap: 10px; align-items: center; margin-bottom: 14px; }
.news-tag {
  font-size: 12px; color: var(--orange-dark); background: var(--orange-light);
  border: 1px solid var(--orange-border); padding: 2px 9px; border-radius: 6px;
}
.news-date { font-size: 12.5px; color: var(--muted); }
.news-card h3 { font-size: 17px; color: var(--ink); line-height: 1.5; margin-bottom: 10px; font-weight: 700; }
.news-card p { font-size: 14px; color: var(--body); flex: 1; }

/* ---------- CTA ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--orange) 0%, #f97316 55%, #fb923c 100%);
  color: #fff; padding: 66px 0;
}
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-inner h2 { font-size: 32px; font-weight: 800; letter-spacing: -.4px; line-height: 1.3; }
.cta-inner p { opacity: .92; margin-top: 8px; font-size: 16px; }
.cta-band .btn { background: #fff; color: var(--orange-dark); }
.cta-band .btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* ---------- 页脚 ---------- */
footer { background: var(--ink); color: #9ca3af; padding: 62px 0 0; }
.foot-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 44px;
}
.foot-grid h4 { color: #fff; font-size: 15px; margin-bottom: 16px; font-weight: 700; }
.foot-grid p { font-size: 13.5px; line-height: 1.85; }
.foot-grid ul li { margin-bottom: 9px; }
.foot-grid ul a { font-size: 13.5px; color: #9ca3af; transition: .18s; }
.foot-grid ul a:hover { color: #fb923c; }
.foot-logo { margin-bottom: 18px; background: #fff; padding: 8px 12px; border-radius: 8px; display: inline-block; }
.foot-bottom {
  border-top: 1px solid #1f2937; padding: 20px 0;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: 13px; color: #6b7280;
}
.foot-bottom a { color: #9ca3af; text-decoration: none; transition: .18s; }
.foot-bottom a:hover { color: #fb923c; }

/* ---------- 页头 ---------- */
.page-hero {
  background: linear-gradient(180deg, #fff 0%, var(--bg-soft) 100%);
  border-bottom: 1px solid var(--border); padding: 58px 0;
}
.page-hero h1 { font-size: 38px; color: var(--ink); font-weight: 800; letter-spacing: -.4px; }
.page-hero .crumb { font-size: 13.5px; color: var(--muted); margin-bottom: 12px; }
.page-hero .crumb a:hover { color: var(--orange); }
.page-hero p { margin-top: 12px; max-width: 680px; }

/* ---------- 产品详情 ---------- */
.detail-wrap {
  display: grid; grid-template-columns: 1fr 1.15fr; gap: 46px;
  padding: 60px 0;
}
.detail-media {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: #fff; padding: 30px; display: flex; align-items: center; justify-content: center;
  aspect-ratio: 4/3; position: sticky; top: 100px; align-self: start;
}
.detail-media img { max-height: 100%; object-fit: contain; }
.detail-info h1 { font-size: 32px; color: var(--ink); font-weight: 800; line-height: 1.3; letter-spacing: -.4px; }
.detail-info .sub { font-size: 17px; color: var(--orange); font-weight: 600; margin: 8px 0 18px; }
.detail-info .desc { font-size: 15.5px; margin-bottom: 24px; }
.detail-info .desc b { color: var(--ink); }
.detail-feats { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 28px; }
.detail-feats i {
  font-style: normal; font-size: 13px; color: var(--orange-dark);
  background: var(--orange-light); border: 1px solid var(--orange-border);
  padding: 5px 12px; border-radius: 8px; font-weight: 600;
}
.spec-table { width: 100%; border-collapse: collapse; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.spec-table tr:nth-child(odd) { background: var(--bg-soft); }
.spec-table th, .spec-table td { padding: 11px 16px; font-size: 14px; text-align: left; vertical-align: top; }
.spec-table th { color: var(--ink); font-weight: 700; width: 34%; white-space: nowrap; }
.spec-table td { color: var(--body); }
.detail-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 26px 0 14px; }
.detail-src { font-size: 13px; color: var(--muted); }
.detail-src a { color: var(--orange); font-weight: 600; }

.section-sub { margin-top: 20px; font-size: 15.5px; color: var(--ink); font-weight: 700; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; padding: 60px 0; }
.contact-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 24px;
  margin-bottom: 18px;
}
.contact-card h3 { font-size: 16px; color: var(--ink); margin-bottom: 8px; font-weight: 700; }
.contact-card p { font-size: 14.5px; }
.form-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px;
}
.form-card h2 { font-size: 22px; color: var(--ink); margin-bottom: 6px; font-weight: 800; }
.form-card p.fnote { font-size: 14px; margin-bottom: 22px; }
.f-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13.5px; color: var(--ink); font-weight: 600; margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 13px; border: 1px solid var(--border); border-radius: 10px;
  font-size: 14.5px; font-family: inherit; color: var(--ink); background: #fff;
  transition: .18s; outline: none;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--orange); box-shadow: 0 0 0 3px rgba(234, 88, 12, .12);
}
.field textarea { min-height: 110px; resize: vertical; }
.form-tip { font-size: 13px; color: var(--muted); margin-top: 12px; }

/* ---------- 品牌详情页 ---------- */
.brand-block {
  display: grid; grid-template-columns: .85fr 1.15fr; gap: 40px; align-items: center;
  padding: 54px 0; border-bottom: 1px solid var(--border);
}
.brand-block:last-child { border-bottom: none; }
.brand-panel {
  border-radius: 18px; padding: 38px 32px; color: #fff;
  background: linear-gradient(150deg, var(--c, var(--orange)), color-mix(in srgb, var(--c, var(--orange)) 60%, #111827));
  min-height: 260px; display: flex; flex-direction: column; justify-content: space-between;
}
.brand-panel .big { font-size: 34px; font-weight: 800; letter-spacing: -1px; }
.brand-panel .logo-plate {
  background: #fff; border-radius: 12px;
  display: inline-flex; align-items: center;
  height: 68px; padding: 0 20px; width: max-content;
}
.brand-panel .logo-plate img {
  height: 48px; width: auto; max-width: 240px;
  object-fit: contain; display: block;
}
.brand-panel .logo-plate.tall { height: 84px; }
.brand-panel .logo-plate.tall img { height: 64px; max-width: 220px; }
.brand-panel .en2 { opacity: .8; font-size: 14px; letter-spacing: 1px; margin-top: 4px; }
.brand-panel .slogan { font-size: 16px; margin-top: 18px; font-weight: 600; }
.brand-panel .contact { font-size: 13px; opacity: .85; margin-top: 22px; }
.brand-info h2 { font-size: 26px; color: var(--ink); font-weight: 800; margin-bottom: 4px; }
.brand-info .en3 { font-size: 13px; color: var(--muted); letter-spacing: .5px; margin-bottom: 16px; }
.brand-info p { font-size: 15px; margin-bottom: 18px; }
.brand-info .site-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--orange); font-weight: 700; font-size: 14.5px;
}

/* ---------- 关于页 ---------- */
.about-lead { font-size: 19px; color: var(--ink); line-height: 1.8; max-width: 860px; }
.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 34px; }
.value {
  border-left: 3px solid var(--orange); padding-left: 16px;
}
.value h4 { color: var(--ink); font-size: 16px; margin-bottom: 6px; }
.value p { font-size: 13.5px; }

.notice {
  background: var(--orange-light); border: 1px solid var(--orange-border);
  color: var(--orange-dark); border-radius: 12px; padding: 16px 18px;
  font-size: 13.5px; margin: 20px 0;
}

/* ---------- 页脚 logo ---------- */

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; padding: 56px 0; }
  .hero h1 { font-size: 38px; }
  .brand-grid, .product-grid, .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 34px; }
  .detail-wrap { grid-template-columns: 1fr; }
  .detail-media { position: static; }
  .contact-grid { grid-template-columns: 1fr; }
  .brand-block { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .topbar { display: none; }
  .nav-links {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--border);
    flex-direction: column; align-items: stretch; padding: 12px 20px 20px;
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open { display: flex; }
  .nav-item { width: 100%; }
  .nav-sub { position: static; display: block; box-shadow: none; border: none; padding: 0 0 0 14px; margin: 0; }
  .nav-toggle { display: block; }
  .brand-grid, .product-grid, .adv-grid, .app-grid, .news-grid, .svc-grid, .value-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .block-head h2 { font-size: 26px; }
  section.block { padding: 56px 0; }
  .f-row { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .cta-inner h2 { font-size: 24px; }
}