/* ============================================================
   91浏览器 - 全站样式表
   主题：浏览器 / 视频浏览 / 工具类
   配色：深空蓝 + 青绿渐变
   ============================================================ */

/* ---------- CSS 变量与基础 ---------- */
:root {
  --primary: #0e1a2b;
  --primary-light: #16283f;
  --accent: #17c3b2;
  --accent-dark: #0fa295;
  --accent-soft: rgba(23, 195, 178, 0.12);
  --gradient-main: linear-gradient(135deg, #0e1a2b 0%, #14344e 55%, #0fa295 130%);
  --gradient-accent: linear-gradient(135deg, #17c3b2 0%, #0e8f8f 100%);
  --text-main: #1c2733;
  --text-body: #4a5568;
  --text-muted: #8a94a6;
  --bg-body: #f6f8fb;
  --bg-soft: #eef3f8;
  --card-bg: #ffffff;
  --border: #e6ebf2;
  --shadow-sm: 0 4px 14px rgba(14, 26, 43, 0.06);
  --shadow-md: 0 12px 32px rgba(14, 26, 43, 0.12);
  --shadow-lg: 0 24px 60px rgba(14, 26, 43, 0.16);
  --radius: 16px;
  --radius-sm: 10px;
  --container: 1200px;
  --font-main: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

body {
  font-family: var(--font-main);
  color: var(--text-body);
  background: var(--bg-body);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--accent);
}

ul {
  list-style: none;
}

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

section {
  padding: 88px 0;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-dark);
  background: var(--accent-soft);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-head p {
  font-size: 16px;
  color: var(--text-muted);
}

/* ---------- 顶部通知条 ---------- */
.topbar {
  background: var(--gradient-accent);
  color: #fff;
  font-size: 13px;
  text-align: center;
  padding: 8px 16px;
  letter-spacing: 0.3px;
}

.topbar a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 导航栏 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(14, 26, 43, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 6px 24px rgba(14, 26, 43, 0.18);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.5px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  box-shadow: 0 6px 16px rgba(23, 195, 178, 0.4);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-menu a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  font-weight: 500;
  padding: 9px 16px;
  border-radius: 10px;
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.nav-menu a.active::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 5px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}

.nav-cta {
  background: var(--gradient-accent) !important;
  color: #fff !important;
  font-weight: 700;
  padding: 10px 22px !important;
  border-radius: 999px !important;
  box-shadow: 0 6px 16px rgba(23, 195, 178, 0.35);
}

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

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

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

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

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

/* ---------- Hero 主视觉 ---------- */
.hero {
  position: relative;
  background: var(--gradient-main);
  color: #fff;
  padding: 120px 0 130px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(23, 195, 178, 0.28) 0%, transparent 65%);
  border-radius: 50%;
  animation: float 9s ease-in-out infinite;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -160px;
  left: -100px;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(23, 195, 178, 0.16) 0%, transparent 60%);
  border-radius: 50%;
  animation: float 12s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(26px) scale(1.06); }
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.hero-content {
  animation: fadeUp 0.9s ease-out both;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #c9f5ee;
  font-size: 13px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
  backdrop-filter: blur(6px);
}

.hero h1 {
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 900;
  line-height: 1.22;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.hero h1 span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.82);
  max-width: 560px;
  margin-bottom: 34px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  padding: 14px 30px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-main);
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 10px 26px rgba(23, 195, 178, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 34px rgba(23, 195, 178, 0.5);
  color: #fff;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
  color: #fff;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 42px;
  flex-wrap: wrap;
}

.hero-stats .stat {
  text-align: left;
}

.hero-stats .stat strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: #fff;
}

.hero-stats .stat span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.68);
}

.hero-visual {
  position: relative;
  animation: fadeUp 1s ease-out 0.2s both;
}

.hero-browser {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 20px;
  backdrop-filter: blur(10px);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: rotate(1.2deg);
}

.browser-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  padding: 12px 16px;
}

.browser-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
}

.browser-dot:nth-child(1) { background: #ff6b6b; }
.browser-dot:nth-child(2) { background: #ffd93d; }
.browser-dot:nth-child(3) { background: #6bcb77; }

.browser-addr {
  flex: 1;
  margin-left: 8px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.5px;
}

.browser-body {
  padding: 18px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.video-cell {
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  aspect-ratio: 4 / 5;
}

.video-cell img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-cell::after {
  content: "▶";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, transparent 40%, rgba(14, 26, 43, 0.7) 100%);
  color: #fff;
  font-size: 22px;
  opacity: 0.85;
}

.hero-float-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  color: var(--text-main);
  border-radius: 14px;
  padding: 12px 18px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: float 5s ease-in-out infinite;
}

.hero-float-card .icon {
  font-size: 18px;
}

.hero-float-card.fc-1 {
  top: 18px;
  left: -22px;
}

.hero-float-card.fc-2 {
  bottom: 26px;
  right: -14px;
  animation-delay: 1.2s;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(32px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 特性区 ---------- */
.features {
  background: var(--bg-body);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: rgba(23, 195, 178, 0.35);
}

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

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 22px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: var(--gradient-accent);
  color: #fff;
  transform: rotate(-6deg) scale(1.06);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14.5px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.feature-link {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-dark);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.feature-link::after {
  content: "→";
  transition: transform 0.3s ease;
}

.feature-link:hover::after {
  transform: translateX(5px);
}

/* ---------- 服务介绍区 ---------- */
.services {
  background: var(--bg-soft);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.service-item {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 24px;
  padding: 30px 28px;
  transition: var(--transition);
}

.service-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
}

.service-thumb {
  border-radius: 14px;
  overflow: hidden;
  aspect-ratio: 1 / 1;
}

.service-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.service-item:hover .service-thumb img {
  transform: scale(1.1);
}

.service-body h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}

.service-body p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-list li {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-dark);
  background: var(--accent-soft);
  padding: 4px 12px;
  border-radius: 999px;
}

/* ---------- 详细内容区（双栏） ---------- */
.content-split {
  background: var(--bg-body);
}

.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.split-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 380px;
}

.split-body h2 {
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.35;
  margin-bottom: 18px;
}

.split-body p {
  margin-bottom: 16px;
  color: var(--text-body);
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 15px;
}

.check-list li::before {
  content: "✓";
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 3px;
}

/* ---------- 步骤流程 ---------- */
.steps {
  background: var(--gradient-main);
  color: #fff;
}

.steps .section-head h2 {
  color: #fff;
}

.steps .section-head p {
  color: rgba(255, 255, 255, 0.7);
}

.steps .section-eyebrow {
  color: #c9f5ee;
  background: rgba(255, 255, 255, 0.12);
}

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

.step-card {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
  transition: var(--transition);
  backdrop-filter: blur(8px);
}

.step-card:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.12);
}

.step-num {
  font-size: 42px;
  font-weight: 900;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 14px;
}

.step-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}

.step-card p {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.72);
}

/* ---------- 新闻区 ---------- */
.news-section {
  background: var(--bg-body);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.news-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.news-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.news-card:hover .news-thumb img {
  transform: scale(1.08);
}

.news-cat {
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 999px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

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

.news-date {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.news-body h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.45;
  margin-bottom: 10px;
}

.news-body h3 a {
  color: inherit;
}

.news-body h3 a:hover {
  color: var(--accent-dark);
}

.news-body p {
  font-size: 14px;
  color: var(--text-muted);
  flex: 1;
}

.news-more {
  margin-top: 14px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--accent-dark);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ---------- FAQ ---------- */
.faq {
  background: var(--bg-soft);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.open {
  border-color: rgba(23, 195, 178, 0.5);
  box-shadow: var(--shadow-sm);
}

.faq-q {
  width: 100%;
  background: none;
  border: none;
  font-family: var(--font-main);
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
}

.faq-q .faq-icon {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: transform 0.3s ease;
}

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

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-a p {
  padding: 0 24px 20px;
  font-size: 14.5px;
  color: var(--text-body);
}

/* ---------- CTA ---------- */
.cta {
  background: var(--gradient-main);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: "";
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(23, 195, 178, 0.22) 0%, transparent 70%);
  border-radius: 50%;
}

.cta .container {
  position: relative;
  z-index: 2;
}

.cta h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  margin-bottom: 16px;
}

.cta p {
  color: rgba(255, 255, 255, 0.82);
  max-width: 620px;
  margin: 0 auto 34px;
  font-size: 16px;
}

.cta .btn-primary {
  box-shadow: 0 12px 30px rgba(23, 195, 178, 0.5);
}

/* ---------- 页脚 ---------- */
.footer {
  background: #0a1220;
  color: rgba(255, 255, 255, 0.68);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .brand {
  margin-bottom: 14px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.55);
  max-width: 300px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

.footer-col ul a:hover {
  color: var(--accent);
}

.footer-contact li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  margin-bottom: 12px;
  align-items: flex-start;
}

.footer-bottom {
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.42);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- 页内横幅（内页） ---------- */
.page-hero {
  background: var(--gradient-main);
  color: #fff;
  padding: 84px 0 72px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  bottom: -140px;
  right: -80px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(23, 195, 178, 0.2) 0%, transparent 65%);
  border-radius: 50%;
}

.page-hero .container {
  position: relative;
  z-index: 2;
}

.breadcrumb {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 12px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
}

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

.page-hero h1 {
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 900;
  margin-bottom: 14px;
}

.page-hero p {
  color: rgba(255, 255, 255, 0.78);
  max-width: 680px;
  margin: 0 auto;
  font-size: 16px;
}

/* ---------- 关于页 ---------- */
.about-story {
  background: var(--bg-body);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  align-items: center;
}

.about-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.about-media img {
  width: 100%;
  object-fit: cover;
}

.about-text h2 {
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 18px;
}

.about-text p {
  margin-bottom: 16px;
}

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

.value-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
  transition: var(--transition);
}

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

.value-card .feature-icon {
  margin: 0 auto 18px;
}

.value-card h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 10px;
}

.value-card p {
  font-size: 14px;
  color: var(--text-muted);
}

/* ---------- 联系页 ---------- */
.contact-wrap {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
}

.contact-info {
  background: var(--gradient-main);
  color: #fff;
  border-radius: var(--radius);
  padding: 40px 34px;
}

.contact-info h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 14px;
}

.contact-info p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 14.5px;
  margin-bottom: 28px;
}

.contact-method {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
  align-items: flex-start;
}

.contact-method .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.contact-method strong {
  display: block;
  font-size: 15px;
  margin-bottom: 2px;
}

.contact-method span {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.7);
  word-break: break-all;
}

.contact-form {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 34px;
  box-shadow: var(--shadow-sm);
}

.contact-form h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}

.contact-form .form-sub {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 26px;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 7px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-family: var(--font-main);
  font-size: 14.5px;
  color: var(--text-main);
  background: var(--bg-body);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: #fff;
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-tip {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ---------- 新闻列表页 ---------- */
.news-list {
  background: var(--bg-body);
}

.list-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 34px;
}

.cat-filter {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.cat-filter button {
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 600;
  padding: 9px 20px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-body);
  cursor: pointer;
  transition: var(--transition);
}

.cat-filter button.active,
.cat-filter button:hover {
  background: var(--gradient-accent);
  color: #fff;
  border-color: transparent;
}

.news-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 44px;
}

.pagination a {
  min-width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-body);
  font-weight: 600;
  font-size: 14px;
}

.pagination a.active,
.pagination a:hover {
  background: var(--gradient-accent);
  color: #fff;
  border-color: transparent;
}

/* ---------- 新闻详情页 ---------- */
.article {
  background: var(--bg-body);
}

.article-wrap {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 44px;
  align-items: start;
}

.article-main {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 44px 40px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.article-meta .tag {
  color: var(--accent-dark);
  background: var(--accent-soft);
  padding: 3px 12px;
  border-radius: 999px;
  font-weight: 600;
}

.article-cover {
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 28px;
}

.article-cover img {
  width: 100%;
}

.article-main h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
  margin: 30px 0 14px;
}

.article-main h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--primary);
  margin: 24px 0 10px;
}

.article-main p {
  margin-bottom: 16px;
}

.article-main ul {
  margin: 0 0 18px;
  padding-left: 4px;
}

.article-main ul li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 8px;
}

.article-main ul li::before {
  content: "•";
  position: absolute;
  left: 6px;
  color: var(--accent-dark);
  font-weight: 700;
}

.article-quote {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 24px;
  margin: 24px 0;
  color: var(--text-main);
  font-weight: 600;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
}

.article-tags a {
  font-size: 13px;
  color: var(--accent-dark);
  background: var(--accent-soft);
  padding: 6px 14px;
  border-radius: 999px;
}

.article-share {
  display: flex;
  gap: 12px;
  margin-top: 22px;
  align-items: center;
}

.article-share span {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
}

.article-share a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  background: var(--bg-soft);
  color: var(--text-body);
  padding: 8px 16px;
  border-radius: 999px;
}

.article-share a:hover {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.article-side {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 28px;
}

.side-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
}

.side-card h3 {
  font-size: 17px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

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

.side-links a {
  font-size: 14px;
  color: var(--text-body);
  display: flex;
  gap: 8px;
  align-items: flex-start;
  line-height: 1.6;
}

.side-links a:hover {
  color: var(--accent-dark);
}

.side-links a::before {
  content: "▸";
  color: var(--accent);
  flex-shrink: 0;
}

.side-card .btn {
  width: 100%;
  margin-top: 14px;
}

/* ---------- 产品页 ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.product-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-media img {
  transform: scale(1.08);
}

.product-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}

.product-body {
  padding: 26px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-body h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 10px;
}

.product-body p {
  font-size: 14px;
  color: var(--text-muted);
  flex: 1;
  margin-bottom: 16px;
}

.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.product-specs li {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-body);
  background: var(--bg-soft);
  padding: 4px 12px;
  border-radius: 999px;
}

.price-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.price {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
}

.price small {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 4px;
}

.price-row .btn {
  padding: 10px 22px;
  font-size: 14px;
}

/* ---------- 回顶按钮 ---------- */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 30px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 24px rgba(23, 195, 178, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: var(--transition);
  z-index: 998;
}

.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top:hover {
  transform: translateY(-3px);
}

/* ---------- 动画入场 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  section { padding: 64px 0; }

  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual { max-width: 520px; margin: 0 auto; }

  .features-grid,
  .news-grid,
  .products-grid { grid-template-columns: repeat(2, 1fr); }

  .services-grid { grid-template-columns: 1fr; }

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

  .split-grid { grid-template-columns: 1fr; gap: 36px; }

  .footer-grid { grid-template-columns: 1fr 1fr; }

  .article-wrap { grid-template-columns: 1fr; }

  .article-side {
    position: static;
    grid-template-columns: 1fr 1fr;
  }

  .contact-wrap { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-menu {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--primary);
    padding: 12px 20px 20px;
    gap: 4px;
    box-shadow: 0 18px 30px rgba(14, 26, 43, 0.3);
    transform: translateY(-16px);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-menu a { padding: 13px 16px; border-radius: 10px; }

  .nav-cta { text-align: center; margin-top: 8px; }

  .hero { padding: 80px 0 90px; }

  .hero-stats { gap: 24px; }

  .features-grid,
  .news-grid,
  .products-grid,
  .values-grid { grid-template-columns: 1fr; }

  .steps-grid { grid-template-columns: 1fr; }

  .news-list-grid { grid-template-columns: 1fr; }

  .article-main { padding: 28px 22px; }

  .article-side { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px; }

  .hero-float-card { display: none; }

  .section-head { margin-bottom: 36px; }

  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }

  .brand { font-size: 19px; }

  .hero-actions .btn { width: 100%; }

  .service-item { grid-template-columns: 1fr; }

  .service-thumb { max-width: 180px; }

  .pagination a { min-width: 36px; height: 36px; }
}

/* ---------- 无障碍与减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}