/* =====================================================
   思通思信息官网 - 主样式(多页站点)
   ===================================================== */

:root {
  --color-bg: #0a1628;
  --color-bg-secondary: #0f1e36;
  --color-bg-card: #142544;
  --color-text: #e8eef8;
  --color-text-muted: #a0aec0;
  --color-accent: #00d4aa;
  --color-accent-hover: #00b894;
  --color-warm: #f5a623;
  --color-warm-hover: #e09614;
  --color-error: #ff6b6b;
  --color-border: rgba(255, 255, 255, 0.08);

  --font-zh: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-en: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --fs-hero: 48px;
  --fs-h2: 32px;
  --fs-h3: 20px;
  --fs-body: 16px;
  --fs-small: 14px;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 80px;

  --max-width: 1200px;
  --section-padding-y: 80px;
  --radius-card: 8px;
  --radius-button: 4px;

  --transition: 250ms ease-out;
}

@media (max-width: 767px) {
  :root {
    --fs-hero: 30px;
    --fs-h2: 24px;
    --fs-h3: 18px;
    --section-padding-y: 48px;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-zh);
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.3; }
p { margin: 0 0 var(--space-sm); }

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: var(--color-bg);
  padding: 8px 16px;
  z-index: 1000;
}
.skip-link:focus { left: 8px; top: 8px; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  min-height: 64px;
}
.site-header__logo { display: inline-flex; flex-shrink: 0; }
.site-header__logo img { height: 40px; width: auto; }
.site-header__phone {
  display: flex;
  flex-direction: column;
  text-align: right;
  font-size: var(--fs-small);
  color: var(--color-text);
  flex-shrink: 0;
}
.site-header__phone-label { color: var(--color-text-muted); }
.site-header__phone strong { color: var(--color-accent); font-size: 18px; font-family: var(--font-en); }

/* ===== Nav(下拉) ===== */
.site-nav {
  margin-left: var(--space-lg);
  margin-right: auto;
}
.site-nav__list {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}
.site-nav__list > li { position: relative; }
.site-nav__list > li > a {
  display: inline-block;
  color: var(--color-text);
  font-size: 15px;
  padding: 22px 4px;
}
.site-nav__list > li > a:hover,
.site-nav__list > li.is-active > a { color: var(--color-accent); }
.site-nav__caret { font-size: 10px; margin-left: 4px; opacity: 0.6; }

.site-nav__has-sub > .site-nav__submenu {
  position: absolute;
  top: 100%;
  left: -16px;
  min-width: 220px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-xs) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition);
  z-index: 10;
}
.site-nav__has-sub:hover > .site-nav__submenu,
.site-nav__has-sub:focus-within > .site-nav__submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.site-nav__submenu a {
  display: block;
  padding: 10px var(--space-md);
  color: var(--color-text);
  font-size: 14px;
}
.site-nav__submenu a:hover {
  background: var(--color-bg-card);
  color: var(--color-accent);
}

.site-nav__cta {
  background: var(--color-accent);
  color: var(--color-bg) !important;
  padding: 8px 16px !important;
  border-radius: var(--radius-button);
  font-weight: 600;
  font-size: 14px !important;
}
.site-nav__cta:hover { background: var(--color-accent-hover); }

/* 语言切换按钮(EN) */
.site-nav__lang {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-button);
  padding: 5px 12px !important;
  font-size: 13px !important;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-text-muted) !important;
  font-family: var(--font-en);
  transition: border-color var(--transition), color var(--transition);
}
.site-nav__lang:hover {
  border-color: var(--color-accent);
  color: var(--color-accent) !important;
}

.site-nav__toggle {
  display: none;
  background: transparent;
  border: 0;
  width: 40px;
  height: 40px;
  cursor: pointer;
  padding: 8px;
}
.site-nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: transform var(--transition);
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius-button);
  font-weight: 600;
  font-size: var(--fs-body);
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
  font-family: inherit;
  text-align: center;
}
.btn--primary {
  background: var(--color-accent);
  color: var(--color-bg) !important;
  box-shadow: 0 4px 18px rgba(0, 212, 170, 0.35);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 212, 170, 0.45);
}
.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text) !important;
}
.btn--ghost:hover { border-color: var(--color-accent); color: var(--color-accent) !important; }
.btn--sm { padding: 8px 16px; font-size: 14px; }

/* ===== Hero(首页大首屏 - 两栏布局) ===== */
.hero {
  padding: 100px 0 80px;
  background:
    radial-gradient(ellipse at top left, rgba(0, 212, 170, 0.14), transparent 55%),
    radial-gradient(ellipse at bottom right, rgba(245, 166, 35, 0.08), transparent 50%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}
.hero__eyebrow {
  display: inline-block;
  color: var(--color-warm);
  font-size: var(--fs-small);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  padding: 4px 12px;
  background: rgba(245, 166, 35, 0.1);
  border: 1px solid rgba(245, 166, 35, 0.3);
  border-radius: 999px;
}
.hero__title {
  font-size: var(--fs-hero);
  margin-bottom: var(--space-md);
  line-height: 1.15;
}
.hero__title-accent { color: var(--color-accent); }
.hero__subtitle {
  font-size: 18px;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  font-weight: 500;
}
.hero__lead {
  font-size: 16px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}
.hero__cta {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: 0;
}
.hero__trust {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-top: var(--space-md);
  color: var(--color-text-muted);
  font-size: var(--fs-small);
}
.hero__trust strong {
  color: var(--color-warm);
  font-weight: 600;
  margin-right: 4px;
}

/* Hero 右侧:数据卡片 */
.hero__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
.stat-card {
  background: linear-gradient(145deg, rgba(20, 37, 68, 0.7), rgba(15, 30, 54, 0.5));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-md);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform var(--transition), border-color var(--transition);
  text-align: center;
}
.stat-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
}
.stat-card--warm:hover { border-color: var(--color-warm); }
.stat-card__num {
  display: block;
  font-size: 40px;
  font-weight: 700;
  font-family: var(--font-en);
  line-height: 1.1;
  color: var(--color-accent);
  margin-bottom: 4px;
}
.stat-card--warm .stat-card__num { color: var(--color-warm); }
.stat-card__num small {
  font-size: 16px;
  font-weight: 600;
  margin-left: 4px;
  color: inherit;
}
.stat-card__label {
  color: var(--color-text);
  font-size: 14px;
  font-weight: 500;
  display: block;
  margin-bottom: 4px;
}
.stat-card__desc {
  color: var(--color-text-muted);
  font-size: 13px;
  margin: 0;
  line-height: 1.5;
}

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; gap: var(--space-lg); }
  .hero { padding: 60px 0 48px; }
  .hero__cta { justify-content: flex-start; }
}

/* 窄屏(<= 480px):stat-card 紧凑显示,避免文字溢出 */
@media (max-width: 480px) {
  .stat-card { padding: var(--space-sm); }
  .stat-card__num { font-size: 30px; }
  .stat-card__num small { font-size: 13px; margin-left: 2px; }
  .stat-card__label { font-size: 13px; }
  .stat-card__desc { font-size: 12px; }
  .hero__title { font-size: 26px; }
  .hero__subtitle { font-size: 15px; }
}

/* ===== Page Hero(子页面小首屏) ===== */
.page-hero {
  padding: 80px 0 60px;
  background:
    radial-gradient(ellipse at top, rgba(0, 212, 170, 0.08), transparent 60%),
    var(--color-bg);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}
.page-hero__eyebrow {
  display: inline-block;
  color: var(--color-accent);
  font-size: var(--fs-small);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}
.page-hero__title { font-size: 40px; margin-bottom: var(--space-md); }
.page-hero__subtitle {
  color: var(--color-text-muted);
  max-width: 720px;
  margin: 0 auto;
  font-size: 17px;
}
@media (max-width: 767px) {
  .page-hero__title { font-size: 26px; }
  .page-hero { padding: 48px 0 32px; }
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--fs-small);
}
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 12px;
  padding-bottom: 12px;
  color: var(--color-text-muted);
}
.breadcrumb__list li:not(:last-child)::after {
  content: "›";
  margin-left: 6px;
  color: var(--color-text-muted);
  opacity: 0.5;
}
.breadcrumb__list a { color: var(--color-text-muted); }
.breadcrumb__list a:hover { color: var(--color-accent); }
.breadcrumb__list [aria-current="page"] { color: var(--color-text); }

/* ===== Section 通用 ===== */
.section { padding: var(--section-padding-y) 0; }
.section--alt { background: var(--color-bg-secondary); }
.section--cta {
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-card));
}
.section__header { text-align: center; margin-bottom: var(--space-lg); }
.section__title { font-size: var(--fs-h2); margin-bottom: var(--space-sm); }
.section__lead { color: var(--color-text-muted); font-size: 17px; margin: 0; }
.hint { color: var(--color-error); font-size: var(--fs-small); margin-left: 6px; }

/* ===== Service cards ===== */
.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}
.service-card {
  background: var(--color-bg-card);
  padding: var(--space-md);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}
.service-card:hover { transform: translateY(-4px); border-color: var(--color-accent); }
.service-card__title {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
}
.service-card p { color: var(--color-text-muted); margin: 0 0 var(--space-sm); flex-grow: 1; }
.service-card__more {
  font-size: var(--fs-small);
  margin-top: auto;
}

/* ===== Features ===== */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
}
.feature {
  padding: var(--space-md);
  border-left: 3px solid var(--color-accent);
}
.feature__title { font-size: var(--fs-h3); margin-bottom: var(--space-xs); }
.feature__desc { color: var(--color-text-muted); margin: 0; }

/* ===== Logo grid ===== */
.logo-grid { display: grid; gap: var(--space-md); }
.logo-grid--clients { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.logo-grid--partners { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.logo-grid li {
  background: #fff;
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform var(--transition);
}
.logo-grid li:hover { transform: translateY(-3px); }
.logo-grid img { width: 100%; height: auto; display: block; }

/* ===== Cases ===== */
.cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
}
.case-card {
  background: var(--color-bg-card);
  padding: var(--space-md);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
}
.case-card__title {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
}
.case-card p { margin: 0 0 12px; color: var(--color-text-muted); font-size: 15px; }
.case-card p strong { color: var(--color-text); margin-right: 4px; }
.case-card__result { padding-top: 12px; border-top: 1px dashed var(--color-border); margin-top: auto !important; }

/* ===== Process ===== */
.process {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-md);
}
.process__step {
  position: relative;
  padding: var(--space-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
}
.process__num {
  display: block;
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
  line-height: 1;
}
.process__step strong { display: block; margin-bottom: var(--space-xs); font-size: var(--fs-h3); }
.process__step p { margin: 0; color: var(--color-text-muted); font-size: var(--fs-small); }

/* ===== FAQ ===== */
.faq { max-width: 800px; margin: 0 auto; }
.faq__item {
  background: var(--color-bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
}
.faq__item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 17px;
  padding: var(--space-xs) 0;
  list-style: none;
  position: relative;
  padding-right: 32px;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  color: var(--color-accent);
  transition: transform var(--transition);
  line-height: 1;
}
.faq__item[open] summary::after { content: "−"; }
.faq__item p { margin: var(--space-sm) 0 0; color: var(--color-text-muted); }

/* ===== Solutions ===== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}
.solution-card {
  background: var(--color-bg-card);
  padding: var(--space-lg) var(--space-md);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  text-align: center;
}
.solution-card:hover { border-color: var(--color-accent); transform: translateY(-4px); }
.solution-card__icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin: 0 auto var(--space-sm);
  display: block;
}
.solution-card__title { font-size: var(--fs-h3); margin-bottom: var(--space-sm); }
.solution-card p { color: var(--color-text-muted); margin-bottom: var(--space-md); }

/* ===== Article(资讯文章) ===== */
.article-body {
  max-width: 760px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.8;
}
.article-body h2 {
  font-size: 26px;
  margin: var(--space-lg) 0 var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}
.article-body h3 {
  font-size: 20px;
  margin: var(--space-md) 0 var(--space-sm);
  color: var(--color-accent);
}
.article-body p { color: var(--color-text); margin-bottom: var(--space-md); }
.article-body ul, .article-body ol {
  list-style: disc;
  padding-left: var(--space-md);
  margin: 0 0 var(--space-md);
  color: var(--color-text);
}
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 8px; }
.article-body blockquote {
  margin: var(--space-md) 0;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-card);
  border-left: 3px solid var(--color-accent);
  color: var(--color-text-muted);
}
.article-meta {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--fs-small);
  margin-bottom: var(--space-lg);
}
.article-meta span + span::before {
  content: "·";
  margin: 0 8px;
}

/* News list */
.news-list {
  display: grid;
  gap: var(--space-md);
  max-width: 800px;
  margin: 0 auto;
}
.news-item {
  background: var(--color-bg-card);
  padding: var(--space-md);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition);
}
.news-item:hover { border-color: var(--color-accent); }
.news-item__date {
  color: var(--color-text-muted);
  font-size: var(--fs-small);
  font-family: var(--font-en);
}
.news-item__title { font-size: var(--fs-h3); margin: 6px 0 var(--space-sm); }
.news-item__title a { color: var(--color-text); }
.news-item__title a:hover { color: var(--color-accent); }
.news-item__excerpt { color: var(--color-text-muted); margin: 0; }

/* Pain points list(痛点列表) */
.pain-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}
.pain-list li {
  padding: var(--space-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-error);
}
.pain-list strong { display: block; margin-bottom: 6px; }
.pain-list p { color: var(--color-text-muted); margin: 0; font-size: 15px; }

/* Scope list(服务范围) */
.scope-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
}
.scope-list li {
  padding: var(--space-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
}
.scope-list h3 {
  color: var(--color-accent);
  font-size: var(--fs-h3);
  margin-bottom: var(--space-xs);
}
.scope-list p { color: var(--color-text-muted); margin: 0; font-size: 15px; }

/* ===== Contact ===== */
.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}
.contact__info p { color: var(--color-text-muted); }
.contact__list { margin-top: var(--space-md); }
.contact__list li {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-xs) 0;
}
.contact__list span { color: var(--color-text-muted); min-width: 48px; }
.contact__form {
  background: var(--color-bg-card);
  padding: var(--space-md);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  display: grid;
  gap: var(--space-sm);
}
.contact__form label { display: block; }
.contact__form > label > span {
  display: block;
  font-size: var(--fs-small);
  margin-bottom: 6px;
  color: var(--color-text-muted);
}
.contact__form input,
.contact__form textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-button);
  color: var(--color-text);
  font-family: inherit;
  font-size: var(--fs-body);
  transition: border-color var(--transition);
}
.contact__form input:focus,
.contact__form textarea:focus { outline: none; border-color: var(--color-accent); }
.contact__hint { font-size: var(--fs-small); color: var(--color-text-muted); margin: 0; }

/* ===== CTA strip(每页底部统一引导) ===== */
.cta-strip {
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-card));
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.cta-strip__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
}
.cta-strip h2 { font-size: 26px; margin-bottom: 6px; }
.cta-strip p { color: var(--color-text-muted); margin: 0; }
.cta-strip__actions { display: flex; gap: var(--space-sm); flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg);
  padding: var(--space-xl) 0 var(--space-md);
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}
.site-footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}
.site-footer__brand strong { display: block; color: var(--color-text); font-size: 16px; margin-bottom: var(--space-xs); }
.site-footer__brand p { margin: 4px 0; }
.site-footer__nav h3 { font-size: 15px; color: var(--color-text); margin-bottom: var(--space-sm); }
.site-footer__nav ul li { margin-bottom: 8px; }
.site-footer__nav a { color: var(--color-text-muted); }
.site-footer__nav a:hover { color: var(--color-accent); }
.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.site-footer__bottom a { color: var(--color-text-muted); }
.site-footer__bottom a:hover { color: var(--color-accent); }

/* ===== Fade-in 动效 ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms ease-out, transform 600ms ease-out;
}
.fade-in.is-visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .site-nav { margin-left: var(--space-md); }
  .site-nav__list { gap: var(--space-sm); }
  .site-header__phone { font-size: 12px; }
  .site-header__phone strong { font-size: 15px; }
  .site-footer__top { grid-template-columns: 1fr 1fr; }
  .site-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 767px) {
  .site-nav { margin-left: 0; }
  .site-nav__toggle { display: block; margin-left: auto; }
  .site-nav__list {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--color-bg-secondary);
    padding: var(--space-md);
    gap: 4px;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-110%);
    transition: transform var(--transition);
    z-index: -1;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }
  .site-nav__list.is-open { transform: translateY(0); }
  .site-nav__list > li > a { padding: 12px 4px; }
  .site-nav__has-sub > .site-nav__submenu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: 0;
    padding: 0 0 var(--space-sm) var(--space-md);
    min-width: 0;
  }
  .site-nav__submenu a { padding: 8px 0; font-size: 13px; }
  .site-header__phone { display: none; }

  .hero { padding: 60px 0 40px; }
  .hero__highlights { gap: var(--space-md); flex-direction: column; }
  .contact { grid-template-columns: 1fr; gap: var(--space-lg); }
  .site-footer__top { grid-template-columns: 1fr; gap: var(--space-md); }
  .site-footer__bottom { flex-direction: column; }
  .cta-strip__inner { flex-direction: column; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .fade-in { opacity: 1; transform: none; }
}

/* ===== 价格高亮(暖色,与品牌主色青绿区分) ===== */
.price-highlight { color: var(--color-warm); font-weight: 600; }

/* ===== 行业页:行业现状/介绍段落 ===== */
.industry-intro {
  max-width: 760px;
  margin: 0 auto;
  color: var(--color-text-muted);
  text-align: center;
}

/* ===== 案例页:客户评价归属 ===== */
.quote-attribution {
  text-align: right;
  margin: 0;
  font-style: normal;
}

/* ===== 首页:客户评价(口碑) ===== */
.testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}
.testimonial-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-md) var(--space-md) var(--space-sm);
  position: relative;
  display: flex;
  flex-direction: column;
}
.testimonial-card::before {
  content: "\201C";
  position: absolute;
  top: -8px;
  left: var(--space-md);
  font-size: 64px;
  color: var(--color-accent);
  line-height: 1;
  font-family: Georgia, "Times New Roman", serif;
  opacity: 0.35;
  pointer-events: none;
}
.testimonial-card__quote {
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.75;
  margin: var(--space-md) 0;
  flex-grow: 1;
}
.testimonial-card__meta {
  border-top: 1px dashed var(--color-border);
  padding-top: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.testimonial-card__author { color: var(--color-text); font-weight: 600; }
.testimonial-card__role { color: var(--color-text-muted); font-size: var(--fs-small); }

/* ===== 区域页:服务区域标签 ===== */
.area-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  max-width: 880px;
  margin: 0 auto;
}
.area-tags li {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 18px;
  color: var(--color-text);
  font-size: 15px;
  transition: border-color var(--transition);
}
.area-tags li:hover { border-color: var(--color-accent); }

/* ===== 工具类 ===== */
.text-center { text-align: center; }

/* ===== 关于页:原则列表 ===== */
.principle-list {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
}
.principle-list li { color: var(--color-text-muted); }
.principle-list strong {
  color: var(--color-accent);
  font-size: 22px;
  margin-right: 6px;
  font-family: var(--font-en);
}

/* ===== 联系页:inline style 替换 ===== */
.contact__section-heading { font-size: var(--fs-h3); margin-bottom: var(--space-sm); }
.contact__method-heading { margin-top: var(--space-lg); font-size: var(--fs-h3); margin-bottom: 0; }
.contact__method-list {
  margin-top: var(--space-sm);
  color: var(--color-text-muted);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

/* ===== 联系页:微信二维码区块 ===== */
.wechat-block {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
}
.wechat-block h2 { font-size: 20px; margin-bottom: var(--space-sm); }
.wechat-block > p { color: var(--color-text-muted); margin-bottom: 0; }
.wechat-block__qr {
  width: 200px;
  height: auto;
  margin: var(--space-md) auto;
  border-radius: var(--radius-card);
  display: block;
}
.wechat-block__or {
  color: var(--color-text-muted);
  font-size: var(--fs-small);
  margin: var(--space-md) 0;
}
.wechat-block__actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== 404 错误页 ===== */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl) 0;
}
.error-page__code {
  font-size: 120px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: var(--font-en);
  line-height: 1;
  margin-bottom: var(--space-sm);
}
.error-page__title { font-size: var(--fs-h2); margin-bottom: var(--space-md); }
.error-page__desc {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.error-page__actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}