/* ==========================================================================
   财姐姐集团 / Cai Jiejie Group — corporate website
   Design system (CSS3 only — no JavaScript anywhere)
   Palette: Navy #1B2A4A · Gold #C9A961 · White #FFFFFF
            Warm #F8F7F3 · Ink #242B36 · Muted #687080 · Border #E7E8EC
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Variables · 变量
   -------------------------------------------------------------------------- */
:root {
  --navy: #1B2A4A;
  --navy-deep: #142036;
  --gold: #C9A961;
  --gold-dark: #A9873F;
  --white: #FFFFFF;
  --warm: #F8F7F3;
  --ink: #242B36;
  --muted: #687080;
  --border: #E7E8EC;
  --error: #B3261E;
  --success-bg: #EAF3EA;
  --success-border: #BFDCC2;
  --success-text: #27572C;
  --error-bg: #FBEDEB;
  --error-border: #EBC3BE;

  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(27, 42, 74, 0.05);
  --shadow-md: 0 12px 28px rgba(27, 42, 74, 0.10);
  --header-h: 72px;

  --font: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
          "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
}

/* --------------------------------------------------------------------------
   2. Reset & base · 重置与基础样式
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--navy);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--gold-dark);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3 {
  color: var(--navy);
  font-weight: 700;
  line-height: 1.35;
}

::selection {
  background: rgba(201, 169, 97, 0.35);
}

:focus-visible {
  outline: 2px solid var(--gold-dark);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 300;
  background: var(--navy);
  color: var(--white);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
}

.skip-link:focus {
  top: 16px;
  color: var(--white);
}

/* --------------------------------------------------------------------------
   3. Layout utilities · 布局工具类
   -------------------------------------------------------------------------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 800px;
}

.section {
  padding: 88px 0;
}

.section-warm {
  background: var(--warm);
}

.section-navy {
  background: var(--navy);
  background-image:
    radial-gradient(900px 420px at 90% -10%, rgba(201, 169, 97, 0.13), transparent 60%),
    radial-gradient(700px 400px at -10% 110%, rgba(201, 169, 97, 0.08), transparent 55%);
}

.section-head {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 14px;
}

.section-head-light h2 {
  color: var(--white);
}

.section-head-light .section-sub {
  color: rgba(255, 255, 255, 0.75);
}

.section-sub {
  color: var(--muted);
  font-size: 1.02rem;
}

.kicker {
  color: var(--gold-dark);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.kicker-gold {
  color: var(--gold);
}

.section-foot {
  text-align: center;
  margin-top: 44px;
}

.lead-para {
  font-size: 1.03rem;
  line-height: 1.9;
  margin-bottom: 16px;
}

/* --------------------------------------------------------------------------
   4. Buttons · 按钮
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease,
              color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-lg {
  padding: 14px 30px;
  font-size: 16px;
}

.btn-gold {
  background: var(--gold);
  color: var(--navy);
}

.btn-gold:hover {
  background: #b9974f;
  color: var(--navy);
  box-shadow: 0 6px 18px rgba(201, 169, 97, 0.35);
}

.btn-navy {
  background: var(--navy);
  color: var(--white);
}

.btn-navy:hover {
  background: #24375e;
  color: var(--white);
}

.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.45);
  color: var(--white);
  background: transparent;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.7);
  color: var(--white);
}

/* --------------------------------------------------------------------------
   5. Header · 页头
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  min-height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.company-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-name {
  color: var(--navy);
  font-size: 18px;
  font-weight: 700;
}

.brand:hover .brand-name {
  color: var(--gold-dark);
}

.brand-sub {
  color: var(--gold-dark);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
}

.main-nav {
  flex: 1;
}

.main-nav ul {
  display: flex;
  gap: 26px;
}

.main-nav a {
  position: relative;
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--gold);
  transition: right 0.25s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--navy);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  right: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}

.lang-switch a {
  padding: 4px 2px;
  font-weight: 500;
}

.lang-switch a.active {
  color: var(--gold-dark);
  font-weight: 700;
}

.lang-sep {
  color: var(--border);
}

.header-cta {
  padding: 10px 22px;
  font-size: 14.5px;
}

/* CSS-only mobile menu (native <details>, no JavaScript).
   纯 CSS 移动端菜单（原生 <details>，不使用 JavaScript）。 */
.mobile-nav {
  display: none;
  position: relative;
}

.mobile-nav summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
  user-select: none;
}

.mobile-nav summary::-webkit-details-marker {
  display: none;
}

.burger {
  position: relative;
  width: 18px;
  height: 2px;
  background: var(--navy);
  transition: background-color 0.2s ease;
}

.burger::before,
.burger::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--navy);
  transition: transform 0.25s ease, top 0.25s ease, bottom 0.25s ease;
}

.burger::before {
  top: -6px;
}

.burger::after {
  bottom: -6px;
}

.mobile-nav[open] .burger {
  background: transparent;
}

.mobile-nav[open] .burger::before {
  top: 0;
  transform: rotate(45deg);
}

.mobile-nav[open] .burger::after {
  bottom: 0;
  transform: rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  max-height: calc(100vh - var(--header-h));
  overflow-y: auto;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 18px 32px rgba(27, 42, 74, 0.12);
  padding: 12px 24px 24px;
}

.mobile-menu ul li {
  border-bottom: 1px solid var(--border);
}

.mobile-menu ul a {
  display: block;
  padding: 15px 4px;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
}

.mobile-menu ul a:hover {
  color: var(--gold-dark);
}

.mobile-menu-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
}

/* --------------------------------------------------------------------------
   6. Hero · 首屏
   -------------------------------------------------------------------------- */
.hero {
  background:
    radial-gradient(1100px 520px at 85% -10%, rgba(201, 169, 97, 0.15), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(201, 169, 97, 0.09), transparent 55%),
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    var(--navy);
  background-size: auto, auto, 44px 44px, 44px 44px, auto;
  padding: 96px 0 88px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.hero-kicker {
  display: inline-block;
  color: var(--gold);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(201, 169, 97, 0.55);
  margin-bottom: 24px;
}

.hero-title {
  color: var(--white);
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  line-height: 1.25;
  margin-bottom: 20px;
}

.hero-subtitle {
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.05rem;
  line-height: 1.85;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 34px;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
}

.hero-chips li {
  border: 1px solid rgba(201, 169, 97, 0.4);
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.85);
  font-size: 13.5px;
  padding: 6px 14px;
  border-radius: 999px;
}

.hero-visual img {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.28));
}

/* --------------------------------------------------------------------------
   7. Service cards · 服务卡片
   -------------------------------------------------------------------------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(201, 169, 97, 0.55);
  box-shadow: var(--shadow-md);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  background: var(--warm);
  color: var(--navy);
  border-radius: 12px;
  margin-bottom: 20px;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.service-card:hover .service-icon {
  background: rgba(201, 169, 97, 0.14);
  color: var(--gold-dark);
}

.service-icon svg,
.advantage-icon svg,
.solution-icon svg {
  width: 26px;
  height: 26px;
}

.service-icon-lg {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  margin-bottom: 0;
  flex-shrink: 0;
}

.service-icon-lg svg {
  width: 32px;
  height: 32px;
}

.service-name {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.service-name a {
  color: var(--navy);
}

.service-name a:hover {
  color: var(--gold-dark);
}

.service-name-en {
  color: var(--gold-dark);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
}

.service-summary {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
  flex-grow: 1;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--navy);
}

.service-link span {
  transition: transform 0.25s ease;
}

.service-link:hover span {
  transform: translateX(4px);
}

.service-teaser {
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
}

.service-teaser li {
  position: relative;
  padding: 4px 0 4px 16px;
}

.service-teaser li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

/* --------------------------------------------------------------------------
   8. Solutions · 解决方案
   -------------------------------------------------------------------------- */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.solution-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.solution-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.solution-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background: var(--warm);
  color: var(--navy);
  border-radius: 12px;
  flex-shrink: 0;
}

.solution-head h3 {
  font-size: 1.08rem;
}

.solution-name-alt {
  color: var(--gold-dark);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.solution-block {
  border-left: 2px solid var(--border);
  padding: 2px 0 2px 14px;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

.solution-block:last-child {
  margin-bottom: 0;
}

.solution-block-help {
  border-left-color: var(--gold);
  background: linear-gradient(to right, rgba(201, 169, 97, 0.08), transparent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 14px;
  color: var(--ink);
}

.solution-label {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.solution-block-help .solution-label {
  color: var(--gold-dark);
}

/* --------------------------------------------------------------------------
   9. Advantages · 优势
   -------------------------------------------------------------------------- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-item {
  text-align: center;
  padding: 30px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.advantage-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.advantage-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(201, 169, 97, 0.5);
  background: var(--white);
  color: var(--gold-dark);
}

.advantage-item h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.advantage-item p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   10. Process · 服务流程
   -------------------------------------------------------------------------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.process-step {
  position: relative;
}

.process-num {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 1px solid rgba(201, 169, 97, 0.55);
  border-radius: 50%;
  background: rgba(201, 169, 97, 0.08);
  color: var(--gold);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}

.process-step::after {
  content: "";
  position: absolute;
  top: 28px;
  left: 68px;
  width: calc(100% - 32px);
  height: 1px;
  border-top: 1px dashed rgba(201, 169, 97, 0.45);
}

.process-step:last-child::after {
  display: none;
}

.process-step h3 {
  color: var(--white);
  font-size: 1.08rem;
  margin-bottom: 8px;
}

.process-step p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 14.5px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   11. About · 关于我们
   -------------------------------------------------------------------------- */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-copy h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin: 8px 0 20px;
}

.about-copy > p {
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 20px;
}

.check-list {
  margin-bottom: 20px;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 6px 0;
  font-size: 15px;
  color: var(--ink);
}

.check-list-lg li {
  font-size: 15.5px;
  padding: 7px 0;
}

.check-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 4px;
  color: var(--gold-dark);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.philosophy-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.philosophy-num {
  display: block;
  color: var(--gold);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.philosophy-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.philosophy-card p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   12. Articles / insights · 文章 / 行业洞察
   -------------------------------------------------------------------------- */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: rgba(201, 169, 97, 0.55);
  box-shadow: var(--shadow-md);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 14px;
}

.article-category {
  background: rgba(201, 169, 97, 0.14);
  color: var(--gold-dark);
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12.5px;
}

.article-title {
  font-size: 1.15rem;
  line-height: 1.5;
  margin-bottom: 10px;
}

.article-title a {
  color: var(--navy);
}

.article-title a:hover {
  color: var(--gold-dark);
}

.article-excerpt {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
  flex-grow: 1;
  margin-bottom: 6px;
}

.article-page-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 8px 0 24px;
}

.article-body p {
  font-size: 16px;
  line-height: 1.95;
  margin-bottom: 18px;
}

.article-back {
  margin-top: 36px;
}

.sample-notice,
.sample-banner {
  background: rgba(201, 169, 97, 0.1);
  border: 1px solid rgba(201, 169, 97, 0.4);
  border-radius: 10px;
  padding: 14px 18px;
  color: #7a6330;
  font-size: 14px;
  line-height: 1.7;
}

.sample-notice {
  margin-bottom: 40px;
}

.sample-banner {
  margin-bottom: 28px;
}

/* --------------------------------------------------------------------------
   13. FAQ (native <details>/<summary>) · 常见问题（原生 <details>/<summary>）
   -------------------------------------------------------------------------- */
.faq-list {
  border-top: 1px solid var(--border);
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 4px;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--ink);
  transition: color 0.2s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  color: var(--navy);
}

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--gold-dark);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1;
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
  background: rgba(201, 169, 97, 0.14);
}

.faq-answer {
  padding: 0 44px 22px 4px;
}

.faq-answer p {
  color: var(--muted);
  line-height: 1.85;
  max-width: 640px;
}

/* --------------------------------------------------------------------------
   14. CTA band · 行动号召横幅
   -------------------------------------------------------------------------- */
.cta-band {
  background:
    radial-gradient(800px 320px at 15% 0%, rgba(201, 169, 97, 0.14), transparent 60%),
    var(--navy);
  padding: 72px 0;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.cta-title {
  color: var(--white);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin-bottom: 8px;
}

.cta-sub {
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.02rem;
}

/* --------------------------------------------------------------------------
   15. Footer · 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.75);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding: 72px 0 56px;
}

.footer-brand-head {
  display: flex;
  align-items: center;
  gap: 14px;
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 16px;
}

.footer-brand-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 2px;
  background: var(--gold);
}

.footer-brand-name {
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
}

/* The logo artwork is black; on the dark navy footer it sits on a white
   plate via CSS so the original image stays unmodified.
   Logo 图形为黑色；在深藏青页脚上通过 CSS 置于白色底板之上，
   从而保持原始图片不被修改。 */
.footer-logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
  background: var(--white);
  border-radius: 10px;
  padding: 6px;
}

.footer-intro {
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.7);
}

.footer-heading {
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14.5px;
}

.footer-links a:hover {
  color: var(--gold);
}

.footer-contact li {
  font-size: 14.5px;
  line-height: 1.7;
}

.footer-label {
  color: rgba(255, 255, 255, 0.5);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-right: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 20px 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.55);
}

/* Fixed ICP filing number — inherits the footer-bottom typography and only
   needs a small gap after the copyright text. 固定的 ICP 备案号——沿用页脚
   底部排版，仅在版权文字后留出一点间距。 */
.footer-icp {
  /* The global ``a`` colour (--navy) is invisible on the dark footer, so the
     link needs an explicit light colour. 全局 a 的颜色是深蓝，在深色页脚上不可见，
     因此这里显式指定浅色。 */
  color: rgba(255, 255, 255, 0.7);
  margin-left: 12px;
  white-space: nowrap;
}

.footer-icp:hover {
  color: var(--gold);
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-legal a {
  color: rgba(255, 255, 255, 0.7);
}

.footer-legal a:hover {
  color: var(--gold);
}

/* --------------------------------------------------------------------------
   16. Page band + breadcrumb · 页面横幅 + 面包屑
   -------------------------------------------------------------------------- */
.page-band {
  background: linear-gradient(180deg, var(--warm), var(--white));
  border-bottom: 1px solid var(--border);
  padding: 56px 0 48px;
}

.page-band h1 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  margin: 8px 0 12px;
}

.page-band-sub {
  color: var(--muted);
  max-width: 760px;
  line-height: 1.8;
}

.breadcrumb {
  margin-bottom: 20px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  font-size: 13.5px;
  color: var(--muted);
}

.breadcrumb li + li::before {
  content: "/";
  margin: 0 8px;
  color: #c4c8d0;
}

.breadcrumb a:hover {
  color: var(--gold-dark);
}

/* --------------------------------------------------------------------------
   17. Service detail page · 服务详情页
   -------------------------------------------------------------------------- */
.service-detail-head {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 8px;
}

.service-detail-head h1 {
  margin: 0 0 6px;
}

.service-detail-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 56px;
  align-items: start;
}

.service-detail-main h2 {
  font-size: 1.35rem;
  margin: 32px 0 14px;
}

.service-detail-main > h2:first-of-type {
  margin-top: 36px;
}

.note-box {
  background: rgba(201, 169, 97, 0.09);
  border: 1px solid rgba(201, 169, 97, 0.35);
  border-radius: 12px;
  padding: 24px;
  margin-top: 36px;
}

.note-box h2 {
  font-size: 1rem;
  margin: 0 0 10px;
  color: var(--gold-dark);
}

.note-box p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.8;
}

.service-detail-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 36px;
}

.service-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.sidebar-links li {
  margin-bottom: 6px;
}

.sidebar-links a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--ink);
  font-size: 14.5px;
  font-weight: 500;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.sidebar-links a:hover {
  background: var(--warm);
  color: var(--navy);
}

.sidebar-links a.active {
  background: var(--navy);
  color: var(--white);
}

.sidebar-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   18. Contact page + forms · 联系页面 + 表单
   -------------------------------------------------------------------------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 56px;
  align-items: start;
}

.contact-form-wrap {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.contact-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--white);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--gold-dark);
  box-shadow: 0 0 0 3px rgba(201, 169, 97, 0.22);
}

.form-group input[aria-invalid="true"],
.form-group textarea[aria-invalid="true"] {
  border-color: var(--error);
}

.field-error {
  color: var(--error);
  font-size: 13.5px;
  margin-top: 6px;
}

.form-consent .checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.6;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: var(--navy);
}

.checkbox-label a {
  color: var(--gold-dark);
  text-decoration: underline;
}

.form-note {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

/* Honeypot field — visually hidden, present for bots only.
   蜜罐字段——视觉上隐藏，仅针对爬虫。 */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Flash / alert messages · 闪现 / 提示消息 */
.flash-area {
  margin-top: 24px;
}

.flash {
  padding: 14px 18px;
  border-radius: 10px;
  font-size: 14.5px;
  line-height: 1.7;
}

.flash-success {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: var(--success-text);
}

.flash-error {
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  color: var(--error);
}

.contact-info {
  background: var(--warm);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
}

.contact-info h2 {
  font-size: 1.25rem;
  margin-bottom: 20px;
}

.contact-info-row {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 15px;
}

.contact-info-label {
  width: 64px;
  flex-shrink: 0;
  color: var(--muted);
  font-size: 14px;
}

.contact-info-note {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.8;
}

.contact-info-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

.contact-info-sub {
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.contact-info > p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   19. Error page · 错误页面
   -------------------------------------------------------------------------- */
.error-section {
  padding: 120px 0;
}

.error-box {
  text-align: center;
}

.error-code {
  font-size: clamp(4rem, 10vw, 7rem);
  font-weight: 700;
  line-height: 1;
  color: rgba(27, 42, 74, 0.12);
}

.error-box h1 {
  margin: 8px 0 12px;
}

.error-box > p {
  color: var(--muted);
}

.error-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 28px;
}

/* --------------------------------------------------------------------------
   20. Motion preferences · 动画偏好
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}