/* ==========================================================================
   深圳开源时代科技有限公司 - 官网样式表
   Author: Open-Source Times Tech
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --color-primary: #1a73e8;
  --color-primary-dark: #0d5fc4;
  --color-primary-light: #4a9bf5;
  --color-secondary: #00c2a8;
  --color-accent: #ff7a45;
  --color-dark: #0f1f3c;
  --color-text: #2b3445;
  --color-text-light: #6b7689;
  --color-muted: #9aa5b8;
  --color-bg: #ffffff;
  --color-bg-soft: #f5f8fc;
  --color-bg-dark: #0f1f3c;
  --color-border: #e6ecf3;
  --color-white: #ffffff;

  --shadow-sm: 0 2px 8px rgba(15, 31, 60, 0.06);
  --shadow-md: 0 8px 30px rgba(15, 31, 60, 0.08);
  --shadow-lg: 0 16px 50px rgba(15, 31, 60, 0.12);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --container: 1200px;
  --header-h: 72px;

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

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 重置 ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

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

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

ul {
  list-style: none;
}

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 90px 0;
}

.section-soft {
  background: var(--color-bg-soft);
}

.section-dark {
  background: var(--color-bg-dark);
  color: var(--color-white);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 14px;
  padding: 4px 16px;
  background: rgba(26, 115, 232, 0.08);
  border-radius: 30px;
}

.section-header h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 18px;
  line-height: 1.3;
}

.section-dark .section-header h2 {
  color: var(--color-white);
}

.section-header p {
  font-size: 1.05rem;
  color: var(--color-text-light);
}

.section-dark .section-header p {
  color: rgba(255, 255, 255, 0.75);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 50px;
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 8px 22px rgba(26, 115, 232, 0.32);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(26, 115, 232, 0.42);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-dark);
  border-color: var(--color-white);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-ghost:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ---------- 页眉 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-sm);
}

.navbar {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark);
}

.logo:hover {
  color: var(--color-dark);
}

.logo .logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: url("../images/logo.png") center / cover no-repeat;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(103, 55, 22, 0.16);
}

.logo .logo-mark svg {
  display: none;
}

.logo .logo-text small {
  display: block;
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--color-text-light);
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu > li > a {
  display: block;
  padding: 10px 18px;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.98rem;
  border-radius: 8px;
  transition: all var(--transition);
}

.nav-menu > li > a:hover,
.nav-menu > li > a.active {
  color: var(--color-primary);
  background: rgba(26, 115, 232, 0.07);
}

.nav-cta {
  margin-left: 14px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero 区 ---------- */
.hero {
  position: relative;
  padding: 110px 0 120px;
  background: radial-gradient(circle at 20% 20%, rgba(26, 115, 232, 0.12), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0, 194, 168, 0.12), transparent 50%),
    linear-gradient(180deg, #f5f8fc 0%, #ffffff 100%);
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 50px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(26, 115, 232, 0.08);
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 30px;
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--color-secondary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-dark);
  margin-bottom: 22px;
  letter-spacing: -0.5px;
}

.hero h1 .grad {
  background: linear-gradient(120deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p.hero-desc {
  font-size: 1.12rem;
  color: var(--color-text-light);
  margin-bottom: 36px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  gap: 38px;
  flex-wrap: wrap;
}

.hero-stats .stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-dark);
  line-height: 1;
}

.hero-stats .stat-num small {
  font-size: 1rem;
  color: var(--color-primary);
}

.hero-stats .stat-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 6px;
}

/* Hero 视觉区 */
.hero-visual {
  position: relative;
}

.hero-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 26px;
  border: 1px solid var(--color-border);
}

.hero-card .code-window {
  background: var(--color-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 18px;
}

.hero-card .code-head {
  display: flex;
  gap: 7px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.05);
}

.hero-card .code-head span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.hero-card .code-head span:nth-child(1) { background: #ff5f57; }
.hero-card .code-head span:nth-child(2) { background: #febc2e; }
.hero-card .code-head span:nth-child(3) { background: #28c840; }

.hero-card .code-body {
  padding: 20px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.82rem;
  line-height: 1.9;
  color: #c8d3e6;
}

.hero-card .code-body .k { color: #ff7a45; }
.hero-card .code-body .s { color: #00c2a8; }
.hero-card .code-body .c { color: #5a6b8c; font-style: italic; }
.hero-card .code-body .f { color: #4a9bf5; }

.hero-floating {
  position: absolute;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-dark);
}

.hero-floating .fi {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: var(--color-white);
}

.hero-floating.f1 {
  top: -22px;
  right: 30px;
  animation: float 4s ease-in-out infinite;
}
.hero-floating.f1 .fi { background: var(--color-secondary); }

.hero-floating.f2 {
  bottom: -18px;
  left: -22px;
  animation: float 4s ease-in-out infinite 1s;
}
.hero-floating.f2 .fi { background: var(--color-primary); }

.hero-floating.f3 {
  bottom: 40px;
  right: -28px;
  animation: float 4s ease-in-out infinite 2s;
}
.hero-floating.f3 .fi { background: var(--color-accent); }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ---------- 信任栏 ---------- */
.trust-bar {
  padding: 36px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.trust-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.trust-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-weight: 600;
}

.trust-logos {
  display: flex;
  align-items: center;
  gap: 36px;
  flex-wrap: wrap;
}

.trust-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-muted);
  opacity: 0.7;
  transition: opacity var(--transition);
  letter-spacing: 0.5px;
}

.trust-logo:hover {
  opacity: 1;
  color: var(--color-dark);
}

/* ---------- 通用网格 ---------- */
.grid {
  display: grid;
  gap: 28px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 公司简介区 ---------- */
.intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.intro-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, rgba(26, 115, 232, 0.85), rgba(0, 194, 168, 0.75));
  display: grid;
  place-items: center;
  color: var(--color-white);
  box-shadow: var(--shadow-lg);
}

.intro-visual .ring {
  position: absolute;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
}

.intro-visual .ring.r1 { width: 320px; height: 320px; animation: spin 20s linear infinite; }
.intro-visual .ring.r2 { width: 240px; height: 240px; animation: spin 16s linear infinite reverse; border-style: dashed; }
.intro-visual .ring.r3 { width: 160px; height: 160px; animation: spin 12s linear infinite; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

.intro-visual .core {
  position: relative;
  z-index: 2;
  text-align: center;
}

.intro-visual .core .big {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1;
}

.intro-visual .core .sub {
  font-size: 0.95rem;
  opacity: 0.9;
  margin-top: 6px;
}

.intro-content h2 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  color: var(--color-dark);
  margin-bottom: 20px;
  line-height: 1.3;
}

.intro-content p {
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.intro-list {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

.intro-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--color-text);
}

.intro-list .check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(0, 194, 168, 0.15);
  color: var(--color-secondary);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  margin-top: 3px;
}

.intro-list .check svg { width: 13px; height: 13px; }

/* ---------- 服务卡片 ---------- */
.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 34px 28px;
  transition: all var(--transition);
  height: 100%;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.service-icon.alt1 { background: linear-gradient(135deg, #00c2a8, #00937f); }
.service-icon.alt2 { background: linear-gradient(135deg, #ff7a45, #e85d28); }
.service-icon.alt3 { background: linear-gradient(135deg, #8b5cf6, #6d3fd6); }
.service-icon.alt4 { background: linear-gradient(135deg, #f59e0b, #d97706); }
.service-icon.alt5 { background: linear-gradient(135deg, #1a73e8, #0d5fc4); }

.service-icon svg { width: 28px; height: 28px; }

.service-card h3 {
  font-size: 1.25rem;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.service-card p {
  color: var(--color-text-light);
  font-size: 0.96rem;
  margin-bottom: 18px;
}

.service-card .features {
  display: grid;
  gap: 8px;
  margin-bottom: 20px;
}

.service-card .features li {
  font-size: 0.9rem;
  color: var(--color-text);
  display: flex;
  gap: 8px;
  align-items: center;
}

.service-card .features li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-secondary);
  flex-shrink: 0;
}

.service-link {
  font-weight: 600;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-link svg { width: 16px; height: 16px; transition: transform var(--transition); }
.service-card:hover .service-link svg { transform: translateX(4px); }

/* ---------- 解决方案 / 行业 ---------- */
.solution-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  padding: 36px 28px;
  color: var(--color-white);
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transition: transform var(--transition);
}

.solution-card:hover {
  transform: translateY(-6px);
}

.solution-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
}

.solution-card.sol1::before { background: linear-gradient(135deg, #1a73e8, #0a3d8f); }
.solution-card.sol2::before { background: linear-gradient(135deg, #00c2a8, #006e60); }
.solution-card.sol3::before { background: linear-gradient(135deg, #8b5cf6, #4c2a99); }
.solution-card.sol4::before { background: linear-gradient(135deg, #ff7a45, #c93f0f); }
.solution-card.sol5::before { background: linear-gradient(135deg, #0f1f3c, #2c3e5a); }
.solution-card.sol6::before { background: linear-gradient(135deg, #f59e0b, #b45309); }

.solution-card > * { position: relative; z-index: 1; }

.solution-card .sol-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.18);
  display: grid;
  place-items: center;
  margin-bottom: auto;
}

.solution-card .sol-icon svg { width: 26px; height: 26px; }

.solution-card h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.solution-card p {
  font-size: 0.9rem;
  opacity: 0.9;
}

/* ---------- 数据成就 ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.stat-box {
  text-align: center;
  padding: 30px 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition);
}

.stat-box:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.stat-box .num {
  font-size: 2.8rem;
  font-weight: 800;
  background: linear-gradient(120deg, #4a9bf5, #00c2a8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.stat-box .num small {
  font-size: 1.3rem;
  -webkit-text-fill-color: var(--color-secondary);
}

.stat-box .label {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
}

/* ---------- CTA ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-lg);
  padding: 60px 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.cta-band::after {
  content: "";
  position: absolute;
  width: 400px;
  height: 400px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  top: -200px;
  right: -100px;
}

.cta-band h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.cta-band p {
  opacity: 0.9;
  position: relative;
  z-index: 1;
}

.cta-band .btn-primary {
  background: var(--color-white);
  color: var(--color-primary);
  position: relative;
  z-index: 1;
}

.cta-band .btn-primary:hover {
  background: var(--color-dark);
  color: var(--color-white);
}

/* ---------- 通用页面横幅 ---------- */
.page-hero {
  position: relative;
  padding: 80px 0 70px;
  background: linear-gradient(135deg, #0f1f3c 0%, #1a3a6e 100%);
  color: var(--color-white);
  text-align: center;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(0, 194, 168, 0.2), transparent 50%),
    radial-gradient(circle at 20% 80%, rgba(26, 115, 232, 0.25), transparent 50%);
}

.page-hero .container { position: relative; z-index: 1; }

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 1.1rem;
  opacity: 0.85;
  max-width: 640px;
  margin: 0 auto;
}

.products-hero p,
.about-hero p {
  max-width: 900px;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 0.9rem;
  opacity: 0.8;
}

.breadcrumb a { color: rgba(255, 255, 255, 0.85); }
.breadcrumb a:hover { color: var(--color-white); }
.breadcrumb .sep { opacity: 0.5; }

/* ---------- 时间线 ---------- */
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding: 20px 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
  transform: translateX(-50%);
}

.tl-item {
  position: relative;
  width: 50%;
  padding: 0 40px 40px 0;
  left: 0;
  text-align: right;
}

.tl-item:nth-child(even) {
  left: 50%;
  text-align: left;
  padding: 0 0 40px 40px;
}

.tl-item .tl-dot {
  position: absolute;
  top: 6px;
  right: -9px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-white);
  border: 3px solid var(--color-primary);
  z-index: 1;
}

.tl-item:nth-child(even) .tl-dot {
  right: auto;
  left: -9px;
}

.tl-item .tl-year {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.tl-item h4 {
  font-size: 1.1rem;
  color: var(--color-dark);
  margin-bottom: 6px;
}

.tl-item p {
  color: var(--color-text-light);
  font-size: 0.93rem;
}

/* ---------- 文化/价值观 ---------- */
.value-card {
  text-align: center;
  padding: 40px 28px;
  border-radius: var(--radius-md);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.value-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.value-card .v-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(26, 115, 232, 0.12), rgba(0, 194, 168, 0.12));
  color: var(--color-primary);
}

.value-card .v-icon svg { width: 32px; height: 32px; }

.value-card h3 {
  font-size: 1.2rem;
  color: var(--color-dark);
  margin-bottom: 10px;
}

.value-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* ---------- 案例卡片 ---------- */
.case-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.case-thumb {
  height: 200px;
  position: relative;
  display: grid;
  place-items: center;
  color: var(--color-white);
}

.case-thumb .tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-dark);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 30px;
}

.case-thumb .initial {
  font-size: 3rem;
  font-weight: 800;
  opacity: 0.9;
}

.case-body { padding: 26px; }

.case-body h3 {
  font-size: 1.2rem;
  color: var(--color-dark);
  margin-bottom: 10px;
}

.case-body p {
  color: var(--color-text-light);
  font-size: 0.94rem;
  margin-bottom: 16px;
}

.case-meta {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 0.84rem;
  color: var(--color-muted);
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.case-meta span { display: flex; align-items: center; gap: 5px; }
.case-meta svg { width: 14px; height: 14px; }

/* ---------- 新闻卡片 ---------- */
.news-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.news-thumb {
  height: 190px;
  display: grid;
  place-items: center;
  color: var(--color-white);
  position: relative;
}

.news-thumb .date-badge {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--color-dark);
  border-radius: 8px;
  padding: 8px 12px;
  text-align: center;
  line-height: 1.1;
}

.news-thumb .date-badge .d { font-size: 1.3rem; font-weight: 800; }
.news-thumb .date-badge .m { font-size: 0.72rem; color: var(--color-text-light); }

.news-thumb .news-cat {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(0, 0, 0, 0.4);
  color: var(--color-white);
  font-size: 0.76rem;
  padding: 4px 12px;
  border-radius: 30px;
  backdrop-filter: blur(4px);
}

.news-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-body h3 {
  font-size: 1.1rem;
  color: var(--color-dark);
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-body p {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-bottom: 16px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-body .news-more {
  font-size: 0.86rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 新闻列表样式 */
.news-list {
  display: grid;
  gap: 20px;
}

.news-row {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 28px;
  align-items: center;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  transition: all var(--transition);
}

.news-row:hover {
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}

.news-row .nr-date {
  text-align: center;
  border-right: 1px solid var(--color-border);
  padding-right: 28px;
}

.news-row .nr-date .y { font-size: 0.8rem; color: var(--color-muted); }
.news-row .nr-date .d { font-size: 1.8rem; font-weight: 800; color: var(--color-dark); line-height: 1.1; }

.news-row h3 { font-size: 1.1rem; color: var(--color-dark); margin-bottom: 6px; }
.news-row p { color: var(--color-text-light); font-size: 0.9rem; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }

.news-row .nr-cat {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(26, 115, 232, 0.08);
  padding: 5px 14px;
  border-radius: 30px;
}

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 50px;
  align-items: start;
}

.contact-info-list { display: grid; gap: 24px; margin-top: 30px; }

.contact-info-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.contact-info-item .ci2 {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: rgba(26, 115, 232, 0.1);
  color: var(--color-primary);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.contact-info-item .ci2 svg { width: 22px; height: 22px; }

.contact-info-item h4 { font-size: 1rem; color: var(--color-dark); margin-bottom: 4px; }
.contact-info-item p { color: var(--color-text-light); font-size: 0.95rem; }
.contact-info-item a { color: var(--color-text-light); }
.contact-info-item a:hover { color: var(--color-primary); }

.contact-form {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 40px;
  border: 1px solid var(--color-border);
}

.contact-form h3 {
  font-size: 1.4rem;
  color: var(--color-dark);
  margin-bottom: 6px;
}

.contact-form .sub {
  color: var(--color-text-light);
  font-size: 0.92rem;
  margin-bottom: 26px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 7px;
}

.form-group label .req { color: var(--color-accent); }

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--color-bg-soft);
  transition: all var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.12);
}

textarea.form-control { resize: vertical; min-height: 110px; }

.form-group .err { color: #e53e3e; font-size: 0.8rem; margin-top: 5px; display: none; }
.form-group.invalid .form-control { border-color: #e53e3e; }
.form-group.invalid .err { display: block; }

.form-success {
  display: none;
  background: rgba(0, 194, 168, 0.1);
  color: #00937f;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
  font-size: 0.92rem;
  align-items: center;
  gap: 10px;
}

.form-success.show { display: flex; }

/* 办公地址地图 */
.map-placeholder {
  margin-top: 50px;
  min-height: 420px;
  border-radius: var(--radius-lg);
  background: #e8eef6;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.map-placeholder iframe {
  width: 100%;
  height: 420px;
  display: block;
  border: 0;
}

.map-placeholder .map-info {
  position: absolute;
  left: 24px;
  bottom: 24px;
  width: min(480px, calc(100% - 48px));
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  box-shadow: var(--shadow-md);
  display: grid;
  gap: 6px;
}

.map-placeholder .map-info strong {
  color: var(--color-dark);
  font-size: 1rem;
}

.map-placeholder .map-info span {
  color: var(--color-text-light);
  font-size: 0.88rem;
}

.map-placeholder .map-info a {
  font-size: 0.88rem;
  font-weight: 700;
  margin-top: 2px;
}

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

.process-step {
  text-align: center;
  position: relative;
  padding: 20px;
}

.process-step .step-num {
  width: 60px;
  height: 60px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: var(--color-white);
  border: 2px dashed var(--color-primary);
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary);
  counter-increment: step;
  content: counter(step);
}

.process-step h4 { font-size: 1.1rem; color: var(--color-dark); margin-bottom: 8px; }
.process-step p { color: var(--color-text-light); font-size: 0.9rem; }

/* ---------- 技术栈 ---------- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

.tech-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 12px;
  text-align: center;
  transition: all var(--transition);
}

.tech-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); border-color: var(--color-primary); }
.tech-item .t-name { font-size: 0.88rem; font-weight: 600; color: var(--color-text); margin-top: 10px; }
.tech-item .t-emoji { font-size: 1.8rem; }

/* ---------- 分页 ---------- */
.pagination {
  display: none;
  justify-content: center;
  gap: 8px;
  margin-top: 50px;
}

.pagination a {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.92rem;
}

.pagination a:hover, .pagination a.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
}

.faq-q {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--color-dark);
  font-size: 1.02rem;
  gap: 16px;
}

.faq-q .icon {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  transition: transform var(--transition);
  color: var(--color-primary);
}

.faq-item.open .faq-q .icon { transform: rotate(45deg); }

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}

.faq-item.open .faq-a { max-height: 300px; }

.faq-a p {
  padding: 0 24px 20px;
  color: var(--color-text-light);
  font-size: 0.94rem;
}

/* ---------- 产品与应用 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}

.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(26, 115, 232, 0.28);
}

.product-card .product-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.product-card .product-code {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.product-card .product-code.product-logo {
  background: url("../images/logo.png") center / cover no-repeat;
  color: transparent;
  box-shadow: 0 2px 8px rgba(103, 55, 22, 0.14);
}

.product-card .product-type {
  padding: 5px 12px;
  border-radius: 20px;
  background: var(--color-bg-soft);
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 600;
}

.product-card h3 {
  color: var(--color-dark);
  font-size: 1.18rem;
  margin-bottom: 10px;
}

.product-card > p {
  color: var(--color-text-light);
  font-size: 0.92rem;
  margin-bottom: 20px;
}

.product-features {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 14px;
}

.product-features li {
  color: var(--color-text);
  font-size: 0.86rem;
  padding-left: 15px;
  position: relative;
}

.product-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-secondary);
}

.delivery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.delivery-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.delivery-card .delivery-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 30px;
  padding: 0 12px;
  border-radius: 18px;
  background: rgba(26, 115, 232, 0.1);
  color: var(--color-primary);
  font-weight: 800;
  font-size: 0.82rem;
  margin-bottom: 18px;
}

.delivery-card h3 {
  color: var(--color-dark);
  margin-bottom: 10px;
}

.delivery-card p {
  color: var(--color-text-light);
  font-size: 0.92rem;
}

/* ---------- 协议与站点信息 ---------- */
.legal-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.legal-toc {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.legal-toc h3 {
  color: var(--color-dark);
  font-size: 1rem;
  margin-bottom: 14px;
}

.legal-toc ul {
  display: grid;
  gap: 9px;
}

.legal-toc a {
  color: var(--color-text-light);
  font-size: 0.88rem;
}

.legal-toc a:hover {
  color: var(--color-primary);
}

.legal-content {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 5vw, 56px);
  box-shadow: var(--shadow-sm);
}

.legal-meta {
  color: var(--color-text-light);
  font-size: 0.9rem;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 8px;
}

.legal-section {
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.legal-section:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.legal-section h2 {
  color: var(--color-dark);
  font-size: 1.3rem;
  margin-bottom: 14px;
}

.legal-section h3 {
  color: var(--color-dark);
  font-size: 1rem;
  margin: 18px 0 8px;
}

.legal-section p,
.legal-section li {
  color: var(--color-text-light);
  font-size: 0.94rem;
}

.legal-section ul,
.legal-section ol {
  display: grid;
  gap: 8px;
  margin: 12px 0 0 20px;
}

.legal-section ul { list-style: disc; }
.legal-section ol { list-style: decimal; }

.site-map-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
}

.site-map-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
}

.site-map-card h2 {
  color: var(--color-dark);
  font-size: 1.2rem;
  margin-bottom: 18px;
}

.site-map-card ul {
  display: grid;
  gap: 16px;
}

.site-map-card a {
  display: inline-block;
  font-weight: 700;
  margin-bottom: 3px;
}

.site-map-card p {
  color: var(--color-text-light);
  font-size: 0.88rem;
}

.site-info-list {
  display: grid;
  gap: 14px;
}

.site-info-list div {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.site-info-list div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.site-info-list dt {
  color: var(--color-dark);
  font-weight: 700;
}

.site-info-list dd {
  color: var(--color-text-light);
  overflow-wrap: anywhere;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding-top: 70px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo { color: var(--color-white); margin-bottom: 18px; }
.footer-brand .logo small { color: rgba(255, 255, 255, 0.5); }

.footer-about p {
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-social { display: none; }

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.8);
  transition: all var(--transition);
}

.footer-social a:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-3px);
}

.footer-social svg { width: 18px; height: 18px; }

.footer-col h4 {
  color: var(--color-white);
  font-size: 1.05rem;
  margin-bottom: 20px;
  font-weight: 600;
}

.footer-col ul { display: grid; gap: 12px; }

.footer-col ul a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.9rem;
}

.footer-col ul a:hover { color: var(--color-white); padding-left: 4px; }

.footer-contact li {
  display: flex;
  gap: 10px;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.footer-contact svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 4px; opacity: 0.7; }

.footer-bottom {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.85rem;
}

.footer-bottom .links a {
  color: rgba(255, 255, 255, 0.6);
  margin-left: 18px;
}

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

.footer-bottom .icp-link {
  color: inherit;
}

.footer-bottom .icp-link:hover {
  color: var(--color-white);
}

/* ---------- 滚动出现动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal.d1 { transition-delay: 0.1s; }
.reveal.d2 { transition-delay: 0.2s; }
.reveal.d3 { transition-delay: 0.3s; }
.reveal.d4 { transition-delay: 0.4s; }

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 900;
}

.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--color-primary-dark); transform: translateY(-3px); }
.back-top svg { width: 22px; height: 22px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) and (min-width: 769px) {
  .nav-menu > li > a { padding: 10px 10px; font-size: 0.92rem; }
  .nav-cta { margin-left: 4px; }
}

@media (max-width: 992px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 460px; margin: 0 auto; }
  .intro { grid-template-columns: 1fr; gap: 40px; }
  .intro-visual { max-width: 500px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(4, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .legal-layout { grid-template-columns: 1fr; }
  .legal-toc { position: static; }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .nav-menu {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    transition: transform var(--transition);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .nav-menu.open { transform: translateY(0); }
  .nav-menu > li > a { padding: 14px 18px; }
  .nav-cta { margin: 8px 0 0; }
  .nav-cta .btn { width: 100%; }
  .nav-toggle { display: flex; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-bottom .links a { margin: 0 10px; }
  .cta-band { padding: 40px 28px; }
  .form-row { grid-template-columns: 1fr; }
  .news-row { grid-template-columns: 1fr; gap: 16px; }
  .news-row .nr-date { border-right: none; border-bottom: 1px solid var(--color-border); padding: 0 0 12px; display: flex; gap: 10px; align-items: baseline; }
  .timeline::before { left: 18px; }
  .tl-item, .tl-item:nth-child(even) { width: 100%; left: 0; text-align: left; padding: 0 0 30px 50px; }
  .tl-item .tl-dot, .tl-item:nth-child(even) .tl-dot { left: 9px; right: auto; }
  .tech-grid { grid-template-columns: repeat(3, 1fr); }
  .product-grid, .delivery-grid, .site-map-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .grid-4, .stats-grid, .process-grid, .tech-grid { grid-template-columns: 1fr 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { gap: 22px; }
  .contact-form { padding: 26px 20px; }
  .map-placeholder, .map-placeholder iframe { min-height: 460px; height: 460px; }
  .map-placeholder .map-info { left: 12px; bottom: 12px; width: calc(100% - 24px); padding: 16px; }
  .product-features { grid-template-columns: 1fr; }
  .legal-content { padding: 26px 20px; }
  .site-info-list div { grid-template-columns: 1fr; gap: 4px; }
}