/* ==========================================================================
   安徽可视云 · VISION CLOUD 官网设计系统
   Design tokens per V1.2 spec: 深蓝 #0F3460 / 科技蓝 #165DFF / 橙 #FF7D00
   ========================================================================== */

:root {
  /* 色彩体系 */
  --c-navy: #0f3460;
  --c-navy-2: #16406f;
  --c-navy-deep: #0a2540;
  --c-blue: #165dff;
  --c-blue-soft: #e8efff;
  --c-orange: #ff7d00;
  --c-orange-soft: #fff3e6;
  --c-ink: #1d2129;
  --c-body: #4e5969;
  --c-grey: #f2f3f5;
  --c-line: #e5e6eb;
  --c-white: #fff;

  /* 字号 */
  --f-h1: 48px;
  --f-h2: 36px;
  --f-h3: 24px;
  --f-body: 16px;
  --f-sm: 14px;

  /* 间距 */
  --s-section: 80px;
  --s-card: 32px;
  --s-page: 24px;

  /* 其他 */
  --radius: 4px;
  --radius-lg: 8px;
  --shadow-soft: 0 8px 28px rgba(15, 52, 96, 0.1);
  --shadow-hover: 0 16px 40px rgba(15, 52, 96, 0.16);
  --t: 0.3s ease;
  --maxw: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", "Inter", Arial, sans-serif;
  font-size: var(--f-body);
  line-height: 1.6;
  color: var(--c-body);
  background: var(--c-white);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--c-ink);
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: var(--f-h1); letter-spacing: -0.5px; }
h2 { font-size: var(--f-h2); letter-spacing: -0.3px; }
h3 { font-size: var(--f-h3); }

p { margin: 0 0 16px; }
p:last-child { margin-bottom: 0; }

a { color: var(--c-blue); text-decoration: none; transition: color var(--t); }
a:hover { color: var(--c-navy); }

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

ul, ol { margin: 0; padding: 0; list-style: none; }

strong { color: var(--c-ink); font-weight: 700; }

/* ---------- 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--s-page);
}

.section { padding: var(--s-section) 0; }
.section--grey { background: var(--c-grey); }
.section--navy { background: var(--c-navy); color: rgba(255, 255, 255, 0.82); }
.section--navy h2, .section--navy h3 { color: #fff; }

.section-head { max-width: 760px; margin: 0 auto 48px; text-align: center; }
.section-head.is-left { margin-left: 0; text-align: left; }
.section-head .eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  font-size: var(--f-sm);
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--c-blue);
  text-transform: uppercase;
}
.section-head p { margin-top: 16px; }
.section-head--wide { max-width: none; }
@media (min-width: 1200px) {
  .section-head--wide h2 { white-space: nowrap; }
}

.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--5 { grid-template-columns: repeat(5, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 28px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: var(--f-body);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--t), color var(--t), border-color var(--t), transform var(--t);
}
.btn--primary { background: var(--c-blue); color: #fff; }
.btn--primary:hover { background: #0e46d6; color: #fff; }
.btn--navy { background: var(--c-navy); color: #fff; }
.btn--navy:hover { background: var(--c-navy-deep); color: #fff; }
.btn--ghost { border-color: var(--c-navy); color: var(--c-navy); background: transparent; }
.btn--ghost:hover { background: var(--c-navy); color: #fff; }
.btn--light { border-color: rgba(255, 255, 255, 0.6); color: #fff; background: transparent; }
.btn--light:hover { background: #fff; color: var(--c-navy); }
.btn--sm { min-height: 40px; padding: 0 20px; font-size: var(--f-sm); }
.btn--block { width: 100%; }

/* ---------- 标签 ---------- */
.tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 2px;
  background: var(--c-blue-soft);
  color: var(--c-navy);
  font-size: 13px;
  line-height: 1.4;
}
.tag--orange { background: var(--c-orange-soft); color: #b35400; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---------- 导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: 80px;
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: height var(--t), background var(--t), box-shadow var(--t), border-color var(--t);
}
.site-header.is-scrolled {
  height: 64px;
  background: #fff;
  border-bottom-color: var(--c-line);
  box-shadow: 0 2px 16px rgba(15, 52, 96, 0.08);
}
.site-header .container {
  display: flex;
  align-items: center;
  gap: 32px;
  max-width: 1320px;
}
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand__mark {
  width: 34px; height: 34px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--c-navy), var(--c-blue));
  color: #fff;
  display: grid; place-items: center;
  font-size: 14px; font-weight: 800; letter-spacing: -0.5px;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__cn { font-size: 17px; font-weight: 700; color: var(--c-navy); letter-spacing: 0.5px; }
.brand__en { font-size: 10px; letter-spacing: 2.4px; color: var(--c-body); }

.nav { margin-left: auto; }
.nav__list { display: flex; align-items: center; gap: 4px; }
.nav__item { position: relative; }
.nav__link {
  display: flex; align-items: center; gap: 4px;
  height: 64px; padding: 0 14px;
  font-size: 15px; color: var(--c-ink); font-weight: 500;
  transition: color var(--t);
  white-space: nowrap;
}
.nav__link:hover, .nav__item.is-active > .nav__link { color: var(--c-blue); }
.nav__item.is-active > .nav__link::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 0;
  height: 2px; background: var(--c-blue);
}
.nav__caret { font-size: 10px; opacity: 0.6; }

.nav__drop {
  position: absolute;
  top: 100%; left: 50%;
  transform: translate(-50%, 8px);
  width: 260px;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  opacity: 0; visibility: hidden;
  transition: all var(--t);
}
.nav__item:hover .nav__drop { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.nav__drop a {
  display: block; padding: 10px 14px;
  border-radius: var(--radius);
  color: var(--c-ink); font-size: 14px;
}
.nav__drop a:hover { background: var(--c-grey); color: var(--c-blue); }

.header-cta { flex-shrink: 0; }
.nav-toggle {
  display: none;
  width: 48px; height: 48px;
  border: 0; background: none; cursor: pointer;
  color: var(--c-navy);
}
.nav-toggle span {
  display: block; width: 22px; height: 2px; margin: 5px auto;
  background: currentColor; transition: transform var(--t), opacity var(--t);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 1180px) {
  .nav__link { padding: 0 9px; font-size: 14px; }
  .site-header .container { gap: 12px; }
}

@media (max-width: 991px) {
  .nav-toggle { display: block; margin-left: auto; order: 3; }
  .header-cta { display: none; }
  .nav {
    position: fixed;
    top: 64px; left: 0; right: 0;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    background: #fff;
    border-top: 1px solid var(--c-line);
    padding: 8px 16px 24px;
    transform: translateY(-12px);
    opacity: 0; visibility: hidden;
    pointer-events: none; /* 关闭态禁止任何点击穿透（子菜单 visibility:visible 会逃出父级 hidden） */
    transition: all var(--t);
    margin-left: 0;
  }
  .nav.is-open { transform: none; opacity: 1; visibility: visible; pointer-events: auto; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__link { height: 52px; padding: 0; font-size: 16px; border-bottom: 1px solid var(--c-line); }
  .nav__item.is-active > .nav__link::after { display: none; }
  .nav__item.is-active > .nav__link { color: var(--c-blue); }
  .nav__drop {
    position: static; transform: none; width: 100%;
    padding: 4px 0 4px 12px;
    box-shadow: none; border: 0; border-radius: 0;
    opacity: 1; visibility: visible;
    display: block;
  }
  .nav__drop a { padding: 8px 0; font-size: 14px; color: var(--c-body); }
}

/* ---------- 页头（内页） ---------- */
.page-hero {
  padding: 148px 0 64px;
  background: linear-gradient(115deg, var(--c-navy) 0%, #1b4b7d 55%, var(--c-blue) 140%);
  color: rgba(255, 255, 255, 0.8);
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  right: -160px; top: -120px;
  width: 520px; height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(22, 93, 255, 0.5), transparent 65%);
  pointer-events: none;
}
.page-hero h1 { color: #fff; position: relative; z-index: 1; }
.page-hero__sub { margin-top: 16px; font-size: 18px; max-width: 760px; position: relative; z-index: 1; }
.page-hero .breadcrumb { position: relative; z-index: 1; }

.breadcrumb { margin-bottom: 20px; font-size: var(--f-sm); color: rgba(255, 255, 255, 0.65); }
.breadcrumb a { color: rgba(255, 255, 255, 0.8); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span + span::before { content: "/"; margin: 0 8px; opacity: 0.5; }

/* ---------- 卡片 ---------- */
.card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: var(--s-card);
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: transparent; }
.card h3 { margin-bottom: 12px; }
.card__num {
  font-size: 13px; font-weight: 700; letter-spacing: 1px;
  color: var(--c-blue); margin-bottom: 16px;
}
.card__icon {
  width: 48px; height: 48px;
  border-radius: var(--radius);
  background: var(--c-blue-soft);
  color: var(--c-navy);
  display: grid; place-items: center;
  margin-bottom: 20px;
}
.card__icon svg { width: 24px; height: 24px; }
.card__link { display: inline-flex; align-items: center; gap: 6px; margin-top: 20px; font-weight: 600; font-size: var(--f-sm); }

.card--navy { background: var(--c-navy); border-color: transparent; color: rgba(255, 255, 255, 0.78); }
.card--navy h3 { color: #fff; }
.card--navy .card__icon { background: rgba(255, 255, 255, 0.12); color: #fff; }
.card--navy .card__link { color: #8ab4ff; }

/* ---------- 统计条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stats__item { background: #fff; padding: 28px 24px; }
.stats__num { display: block; font-size: 34px; font-weight: 800; color: var(--c-navy); letter-spacing: -1px; line-height: 1.1; }
.stats__num em { font-style: normal; color: var(--c-orange); }
.stats__label { margin-top: 8px; font-size: var(--f-sm); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  padding: 168px 0 96px;
  background: var(--c-navy);
  color: rgba(255, 255, 255, 0.78);
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(1100px 520px at 78% 8%, rgba(22, 93, 255, 0.5), transparent 62%),
    radial-gradient(760px 420px at 8% 92%, rgba(255, 125, 0, 0.16), transparent 65%),
    linear-gradient(160deg, #0a2540 0%, #0f3460 60%, #123a6b 100%);
}
.hero__grid-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 60% 30%, #000 20%, transparent 78%);
}
.hero .container { position: relative; z-index: 2; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 40px;
  font-size: 13px;
  color: #cfe0ff;
  margin-bottom: 24px;
}
.hero__badge i { width: 6px; height: 6px; border-radius: 50%; background: var(--c-orange); }
.hero h1 {
  color: #fff;
  font-size: 54px;
  line-height: 1.16;
  max-width: 900px;
  letter-spacing: -1px;
}
.hero h1 mark {
  background: none;
  color: #ffb154;
}
.hero__sub { margin-top: 24px; font-size: 18px; line-height: 1.7; max-width: 760px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 36px; }
.hero__proof {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}
.hero__proof div { font-size: 15px; color: rgba(255, 255, 255, 0.72); text-align: center; }
.hero__proof strong { display: block; font-size: 24px; color: #fff; margin-bottom: 4px; letter-spacing: -0.5px; }
.hero__proof strong em { font-style: normal; color: #ffb154; }

/* ---------- 版块：能力三卡 ---------- */
.cap-card { display: flex; flex-direction: column; }
.cap-card__vals {
  margin-top: 20px; padding-top: 20px;
  border-top: 1px dashed var(--c-line);
  display: grid; gap: 8px;
}
.cap-card__vals li {
  position: relative; padding-left: 20px;
  font-size: var(--f-sm); color: var(--c-navy);
}
.cap-card__vals li::before {
  content: ""; position: absolute; left: 0; top: 7px;
  width: 8px; height: 8px; border-radius: 2px;
  background: var(--c-orange);
}

/* ---------- 产品卡片 ---------- */
.product-card {
  display: flex; flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all var(--t);
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: transparent; }
.product-card:hover .product-card__arrow { transform: translateX(4px); }
.product-card__top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.product-card__idx { font-size: 12px; font-weight: 700; letter-spacing: 1.6px; color: var(--c-blue); }
.product-card__arrow { color: var(--c-navy); transition: transform var(--t); opacity: 0.4; }
.product-card h3 { font-size: 19px; margin-bottom: 6px; }
.product-card__pos { font-size: 13px; color: var(--c-orange); font-weight: 600; margin-bottom: 12px; }
.product-card p { font-size: 14px; margin-bottom: 18px; }
.product-card .tag-row { margin-top: auto; }

/* ---------- 行业入口 ---------- */
.industry {
  display: block;
  padding: 32px 24px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  transition: all var(--t);
  color: var(--c-body);
}
.industry:hover {
  background: var(--c-navy);
  border-color: var(--c-navy);
  color: rgba(255, 255, 255, 0.8);
  transform: translateY(-4px);
}
.industry:hover h3 { color: #fff; }
.industry:hover .industry__more { color: #ffb154; }
.industry h3 { font-size: 20px; margin-bottom: 12px; transition: color var(--t); }
.industry p { font-size: 14px; }
.industry__more { display: inline-block; margin-top: 20px; font-size: 13px; font-weight: 600; color: var(--c-blue); transition: color var(--t); }

/* ---------- Logo 墙 ---------- */
.logo-wall {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.logo-wall li {
  display: grid; place-items: center;
  min-height: 88px;
  background: #fff;
  font-size: 15px; font-weight: 600;
  color: #5b6472;
  letter-spacing: 1px;
  transition: all var(--t);
}
.logo-wall li:hover { background: #fafbfc; color: var(--c-navy); }

.eco-row {
  display: flex; flex-wrap: wrap; gap: 12px;
  margin-top: 32px;
}
.eco-row span {
  padding: 8px 16px;
  border: 1px solid var(--c-line);
  border-radius: 40px;
  font-size: 13px;
  color: var(--c-body);
  background: #fff;
}

/* ---------- 案例卡 ---------- */
.case-card {
  display: flex; flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--t);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: transparent; }
.case-card__meta { display: flex; gap: 8px; align-items: center; margin-bottom: 16px; }
.case-card h3 { font-size: 18px; margin-bottom: 16px; }
.case-card__metrics { display: grid; gap: 10px; margin-top: 4px; }
.case-card__metrics li {
  display: flex; align-items: baseline; gap: 10px;
  font-size: 14px; color: var(--c-body);
}
.case-card__metrics b { font-size: 22px; color: var(--c-orange); font-weight: 800; letter-spacing: -0.5px; }

/* ---------- CTA 通栏 ---------- */
.cta-bar {
  background: linear-gradient(110deg, var(--c-navy) 0%, #1d4c80 60%, var(--c-blue) 130%);
  color: rgba(255, 255, 255, 0.8);
  padding: 64px 0;
}
.cta-bar .container { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta-bar h2 { color: #fff; }
.cta-bar p { margin-top: 12px; }
.cta-bar__actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* CTA 三层转化入口 */
.cta-bar__entries { display: flex; gap: 16px; flex-wrap: wrap; }
.cta-entry {
  display: flex; flex-direction: column; gap: 6px;
  width: 240px; padding: 18px 20px;
  text-align: left;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-lg);
  color: #fff; font-family: inherit;
  cursor: pointer;
  transition: background var(--t), transform var(--t), border-color var(--t);
}
.cta-entry:hover { background: rgba(255, 255, 255, 0.16); border-color: #fff; transform: translateY(-3px); }
.cta-entry strong { font-size: 12px; font-weight: 500; color: rgba(255, 255, 255, 0.65); }
.cta-entry span { font-size: 17px; font-weight: 700; }
.cta-entry em { font-style: normal; font-size: 12px; line-height: 1.6; color: rgba(255, 255, 255, 0.7); }

/* AI 真实业务场景流程卡 */
.ai-flow {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-soft);
}
.ai-flow h3 {
  display: flex; align-items: center; gap: 10px;
  font-size: 17px;
}
.ai-flow h3 svg { color: var(--c-blue); flex-shrink: 0; }
.flow-steps {
  list-style: none;
  counter-reset: step;
  margin-top: 16px;
  display: flex; flex-direction: column; gap: 8px;
}
.flow-steps li {
  counter-increment: step;
  position: relative;
  padding: 10px 12px 10px 44px;
  background: var(--c-grey);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--c-body);
}
.flow-steps li::before {
  content: counter(step);
  position: absolute; left: 12px; top: 50%;
  transform: translateY(-50%);
  width: 22px; height: 22px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(22, 93, 255, 0.1);
  color: var(--c-blue);
  border-radius: 50%;
  font-size: 12px; font-weight: 700;
}
.value-bar {
  margin-top: 32px;
  padding: 18px 24px;
  background: #fff;
  border: 1px dashed var(--c-blue);
  border-radius: var(--radius-lg);
  text-align: center;
  font-size: 15px;
  color: var(--c-ink);
}
.value-bar strong { color: var(--c-blue); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--c-navy-deep); color: rgba(255, 255, 255, 0.6); padding: 56px 0 0; font-size: 14px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.site-footer .brand__cn { color: #fff; }
.site-footer .brand__en { color: rgba(255, 255, 255, 0.5); }
.footer-about { margin-top: 20px; line-height: 1.8; max-width: 300px; }
.footer-col h3 { font-size: 15px; color: #fff; margin-bottom: 20px; font-weight: 600; }
.footer-col li { margin-bottom: 12px; }
.footer-col a { color: rgba(255, 255, 255, 0.6); }
.footer-col a:hover { color: #fff; }
.footer-col address { font-style: normal; line-height: 1.9; }
.footer-col address a { color: rgba(255, 255, 255, 0.75); }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 24px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.5); }

/* ---------- 移动端底部咨询条 / 返回顶部 ---------- */
.mobile-bar {
  display: none;
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 90;
  background: #fff;
  border-top: 1px solid var(--c-line);
  box-shadow: 0 -2px 16px rgba(15, 52, 96, 0.1);
}
.mobile-bar a {
  flex: 1;
  min-height: 56px;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 600;
}
.mobile-bar a:first-child { color: var(--c-navy); }
.mobile-bar a:last-child { background: var(--c-blue); color: #fff; }

.to-top {
  position: fixed;
  right: 24px; bottom: 24px;
  width: 48px; height: 48px;
  border: 1px solid var(--c-line);
  border-radius: 50%;
  background: #fff;
  color: var(--c-navy);
  display: grid; place-items: center;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  opacity: 0; visibility: hidden;
  transition: all var(--t);
  z-index: 80;
}
.to-top.is-show { opacity: 1; visibility: visible; }
.to-top:hover { background: var(--c-navy); color: #fff; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-line); border-radius: var(--radius-lg); }
table { width: 100%; border-collapse: collapse; min-width: 640px; background: #fff; }
th, td { padding: 16px 20px; text-align: left; font-size: 15px; border-bottom: 1px solid var(--c-line); vertical-align: top; }
thead th { background: var(--c-grey); color: var(--c-ink); font-weight: 700; font-size: 14px; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: #fafbfc; }
td.is-us { background: var(--c-blue-soft); color: var(--c-navy); font-weight: 600; }
th.is-us { background: var(--c-navy); color: #fff; }

/* ---------- 时间轴 ---------- */
.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 8px; bottom: 8px;
  width: 2px; background: var(--c-line);
}
.timeline li { position: relative; padding-bottom: 36px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: -28px; top: 6px;
  width: 12px; height: 12px; border-radius: 50%;
  background: #fff; border: 2px solid var(--c-blue);
}
.timeline__year { display: block; font-size: 22px; font-weight: 800; color: var(--c-navy); letter-spacing: -0.5px; }
.timeline__title { display: block; font-size: 17px; font-weight: 700; color: var(--c-ink); margin: 6px 0 8px; }

/* ---------- 服务三维拆解 ---------- */
.svc { border: 1px solid var(--c-line); border-radius: var(--radius-lg); background: #fff; overflow: hidden; }
.svc__head { padding: 24px 28px; background: var(--c-grey); border-bottom: 1px solid var(--c-line); }
.svc__head h3 { font-size: 20px; margin-bottom: 6px; }
.svc__head p { font-size: 14px; color: var(--c-orange); font-weight: 600; margin: 0; }
.svc__body { display: grid; grid-template-columns: 1fr 1fr; }
.svc__row { padding: 20px 28px; border-bottom: 1px solid var(--c-line); }
.svc__row:nth-child(odd) { border-right: 1px solid var(--c-line); }
.svc__row.is-full { grid-column: 1 / -1; border-right: 0; }
.svc__row:last-child, .svc__row.is-full:last-child { border-bottom: 0; }
.svc__label {
  display: block; font-size: 12px; font-weight: 700; letter-spacing: 1.5px;
  color: var(--c-blue); margin-bottom: 8px;
}
.svc__row p { font-size: 14px; margin: 0; }
.svc__row ul { display: grid; gap: 6px; font-size: 14px; }
.svc__row ul li { position: relative; padding-left: 14px; }
.svc__row ul li::before { content: ""; position: absolute; left: 0; top: 9px; width: 5px; height: 5px; border-radius: 50%; background: var(--c-orange); }

/* ---------- 表单 ---------- */
.form { display: grid; gap: 20px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { display: grid; gap: 8px; }
.field label { font-size: 14px; font-weight: 600; color: var(--c-ink); }
.field label span { color: var(--c-orange); }
.field input, .field select, .field textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-grey);
  font-family: inherit;
  font-size: 15px;
  color: var(--c-ink);
  transition: border-color var(--t), background var(--t);
}
.field textarea { min-height: 132px; resize: vertical; line-height: 1.6; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--c-blue);
}
.form__hint { font-size: 13px; color: #86909c; }
.form__msg { display: none; padding: 14px 16px; border-radius: var(--radius); font-size: 14px; }
.form__msg.is-ok { display: block; background: #e8f7ee; color: #0d7a3f; }
.form__msg.is-err { display: block; background: #fdecec; color: #c62828; }

/* ---------- 筛选 ---------- */
.filter { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.filter button {
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid var(--c-line);
  border-radius: 40px;
  background: #fff;
  color: var(--c-body);
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: all var(--t);
}
.filter button:hover { border-color: var(--c-blue); color: var(--c-blue); }
.filter button.is-active { background: var(--c-navy); border-color: var(--c-navy); color: #fff; }

/* ---------- 列表卡（资讯） ---------- */
.news-card {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 28px;
  padding: 24px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background: #fff;
  transition: all var(--t);
  color: var(--c-body);
}
.news-card:hover { box-shadow: var(--shadow-hover); border-color: transparent; transform: translateY(-2px); }
.news-card__thumb {
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #dce6f5, #eef3fb);
  display: grid; place-items: center;
  color: var(--c-navy); font-size: 12px; letter-spacing: 2px; opacity: 0.7;
}
.news-card__meta { display: flex; gap: 12px; align-items: center; font-size: 13px; color: #86909c; margin-bottom: 10px; }
.news-card h3 { font-size: 20px; margin-bottom: 10px; transition: color var(--t); }
.news-card:hover h3 { color: var(--c-blue); }

/* ---------- 分页 ---------- */
.pager { display: flex; justify-content: center; gap: 8px; margin-top: 48px; }
.pager button {
  min-width: 44px; min-height: 44px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: #fff; color: var(--c-body);
  font-family: inherit; font-size: 14px; cursor: pointer;
  transition: all var(--t);
}
.pager button:hover { border-color: var(--c-blue); color: var(--c-blue); }
.pager button.is-active { background: var(--c-navy); border-color: var(--c-navy); color: #fff; }
.pager button:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---------- 折叠 FAQ ---------- */
.faq-group + .faq-group { margin-top: 48px; }
.faq-group h2 { font-size: 26px; margin-bottom: 20px; }
.faq-item { border-bottom: 1px solid var(--c-line); }
.faq-q {
  width: 100%;
  min-height: 64px;
  padding: 20px 44px 20px 0;
  position: relative;
  border: 0; background: none;
  text-align: left;
  font-family: inherit; font-size: 16px; font-weight: 600; color: var(--c-ink);
  cursor: pointer;
}
.faq-q::after {
  content: ""; position: absolute; right: 8px; top: 50%;
  width: 8px; height: 8px;
  border-right: 2px solid var(--c-navy); border-bottom: 2px solid var(--c-navy);
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--t);
}
.faq-item.is-open .faq-q::after { transform: translateY(-30%) rotate(-135deg); }
.faq-a { display: none; padding: 0 44px 24px 0; font-size: 15px; }
.faq-item.is-open .faq-a { display: block; }

/* ---------- 详情页排版 ---------- */
.prose h2 { font-size: 26px; margin: 40px 0 16px; }
.prose h3 { font-size: 20px; margin: 28px 0 12px; }
.prose p { margin-bottom: 16px; }
.prose ul, .prose ol { display: grid; gap: 8px; margin: 0 0 16px; padding-left: 4px; }
.prose ul li { position: relative; padding-left: 18px; }
.prose ul li::before { content: ""; position: absolute; left: 0; top: 10px; width: 6px; height: 6px; border-radius: 50%; background: var(--c-blue); }
.prose blockquote {
  margin: 24px 0;
  padding: 20px 24px;
  border-left: 3px solid var(--c-orange);
  background: var(--c-grey);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--c-ink);
}

/* ---------- 工具类 ---------- */
.lead { font-size: 17px; line-height: 1.8; }
.text-center { text-align: center; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-40 { margin-top: 40px; }
.mt-48 { margin-top: 48px; }
.mb-0 { margin-bottom: 0; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split--wide { grid-template-columns: 1.15fr 0.85fr; }
.stack-24 { display: grid; gap: 24px; }
.check-list { display: grid; gap: 14px; }
.check-list li { position: relative; padding-left: 30px; font-size: 15px; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 3px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--c-blue-soft);
}
.check-list li::after {
  content: ""; position: absolute; left: 6px; top: 8px;
  width: 6px; height: 3px;
  border-left: 2px solid var(--c-blue); border-bottom: 2px solid var(--c-blue);
  transform: rotate(-45deg);
}
.num-list { counter-reset: n; display: grid; gap: 20px; }
.num-list > li { counter-increment: n; position: relative; padding-left: 56px; }
.num-list > li::before {
  content: counter(n, decimal-leading-zero);
  position: absolute; left: 0; top: 0;
  font-size: 15px; font-weight: 800; color: var(--c-blue);
  letter-spacing: 0.5px;
}
.num-list > li h3 { font-size: 17px; margin-bottom: 6px; }
.num-list > li p { font-size: 14px; }

/* ---------- 获取专属方案弹窗 ---------- */
.modal { position: fixed; inset: 0; z-index: 200; display: none; }
.modal.is-open { display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal__overlay { position: absolute; inset: 0; background: rgba(10, 37, 64, 0.55); backdrop-filter: blur(4px); }
.modal__panel {
  position: relative;
  width: 100%;
  max-width: 520px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 32px 32px;
  box-shadow: var(--shadow-hover);
}
.modal__close {
  position: absolute;
  top: 14px; right: 14px;
  width: 40px; height: 40px;
  border: 0; background: none;
  color: var(--c-body);
  font-size: 22px;
  cursor: pointer;
  line-height: 1;
}
.modal__close:hover { color: var(--c-navy); }
.modal__panel h2 { font-size: 24px; }
.modal__panel .modal__desc { margin-top: 8px; font-size: 14px; }
.modal__panel--sm { max-width: 440px; }

/* 联系顾问卡片 */
.contact-ways { margin-top: 24px; display: grid; gap: 14px; }
.contact-way__qr {
  width: 104px; height: 104px;
  margin-left: auto; flex-shrink: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  display: block;
}
.contact-way {
  display: flex; align-items: center; gap: 14px;
  padding: 16px;
  background: var(--c-grey);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--c-ink);
  transition: border-color var(--t), box-shadow var(--t);
}
.contact-way:hover { border-color: var(--c-blue); box-shadow: var(--shadow-soft); }
.contact-way__icon {
  flex-shrink: 0;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(22, 93, 255, 0.1);
  color: var(--c-blue);
  border-radius: var(--radius);
}
.contact-way__body { display: flex; flex-direction: column; gap: 4px; min-width: 0; flex: 1; }
.contact-way__body strong { font-size: 15px; white-space: nowrap; }
.contact-way__body > span:not(.contact-way__icon) { font-size: 13px; color: var(--c-body); }
@media (max-width: 575px) {
  .contact-way { flex-wrap: wrap; }
  .contact-way__body { flex: 1 1 calc(100% - 58px); }
  .contact-way__qr { flex: 1 1 100%; width: 180px; height: 180px; margin: 4px auto 0; }
}

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1199px) {
  :root { --f-h1: 40px; --f-h2: 32px; }
  .hero h1 { font-size: 46px; }
  .grid--5 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .split { gap: 40px; }
}

@media (max-width: 991px) {
  :root { --s-section: 64px; --s-card: 24px; --f-h1: 34px; --f-h2: 28px; --f-h3: 20px; }
  h1 { font-size: var(--f-h1); }
  h2 { font-size: var(--f-h2); }
  h3 { font-size: var(--f-h3); }
  .hero { padding: 128px 0 64px; }
  .hero h1 { font-size: 36px; }
  .hero__sub { font-size: 16px; }
  .hero__proof { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--5 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
  .split, .split--wide { grid-template-columns: 1fr; gap: 32px; }
  .svc__body { grid-template-columns: 1fr; }
  .svc__row:nth-child(odd) { border-right: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .page-hero { padding: 112px 0 48px; }
  .news-card { grid-template-columns: 1fr; gap: 16px; }
  .cta-bar .container { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 575px) {
  :root { --s-section: 48px; --s-card: 20px; --s-page: 16px; --f-h1: 28px; --f-h2: 24px; --f-h3: 18px; --f-body: 15px; }
  h1 { font-size: var(--f-h1); }
  h2 { font-size: var(--f-h2); }
  h3 { font-size: var(--f-h3); }
  .hero { padding: 112px 0 48px; }
  .hero h1 { font-size: 28px; letter-spacing: -0.3px; }
  .hero__badge { font-size: 12px; }
  .hero__proof strong { font-size: 20px; }
  .grid--2, .grid--3, .grid--4, .grid--5 { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .mobile-bar { display: flex; }
  body { padding-bottom: 56px; }
  .to-top { bottom: 72px; right: 16px; }
  .btn { width: 100%; }
  .hero__actions .btn, .cta-bar__actions .btn { width: 100%; }
  .grid--4 { grid-template-columns: 1fr; }
  .cta-bar__entries { flex-direction: column; }
  .cta-entry { width: 100%; }
  .stats__num { font-size: 28px; }
  .section-head { margin-bottom: 32px; }
}

@media (min-width: 576px) and (max-width: 991px) {
  .news-card { grid-template-columns: 200px 1fr; }
}

/* 案例数据口径注释 */
.case-note { font-size: 13px; color: #86909c; margin-top: 12px; line-height: 1.6; }