/* ==========================================================================
   当动科技 · 建站工作室 — 全站样式
   白蓝配色 · 简洁大方
   ========================================================================== */

:root {
  --primary: #1e6fff;
  --primary-dark: #1553d6;
  --primary-deep: #0d3fa8;
  --primary-soft: #eaf2ff;
  --primary-faint: #f5f9ff;
  --sky: #38bdf8;
  --white: #ffffff;
  --ink: #16233d;
  --text: #3d4d68;
  --muted: #71809c;
  --line: #e6ecf5;
  --bg: #f7faff;
  --success: #16a34a;
  --warning: #f59e0b;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(22, 60, 140, 0.06);
  --shadow-md: 0 12px 32px rgba(22, 60, 140, 0.10);
  --shadow-lg: 0 24px 60px rgba(22, 60, 140, 0.14);
  --grad: linear-gradient(135deg, #1e6fff 0%, #38bdf8 100%);
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
    "Source Han Sans SC", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

.container {
  width: min(1180px, 92%);
  margin: 0 auto;
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease,
    background 0.25s ease, color 0.25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 10px 24px rgba(30, 111, 255, 0.32);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 34px rgba(30, 111, 255, 0.42);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.9);
  color: var(--primary-dark);
  border-color: rgba(30, 111, 255, 0.25);
}

.btn-ghost:hover {
  background: #fff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--primary-dark);
  border-color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary-soft);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 9px 18px;
  font-size: 14px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: box-shadow 0.3s ease, border-color 0.3s ease,
    background 0.3s ease;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.96);
  border-color: var(--line);
  box-shadow: 0 6px 24px rgba(22, 60, 140, 0.08);
}

.nav {
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-weight: 800;
  color: var(--ink);
  font-size: 21px;
  letter-spacing: 0.5px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--grad);
  display: grid;
  place-items: center;
  color: #fff;
  flex: none;
  box-shadow: 0 8px 18px rgba(30, 111, 255, 0.32);
}

.brand small {
  display: block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--primary);
  margin-top: -4px;
}

.brand-logo {
  height: 44px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  display: block;
}

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

.nav-links a {
  padding: 9px 15px;
  border-radius: 9px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover {
  color: var(--primary);
  background: var(--primary-faint);
}

.nav-links a.active {
  color: var(--primary);
  background: var(--primary-soft);
  font-weight: 600;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-phone {
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
}

.nav-phone strong {
  color: var(--primary-dark);
  font-size: 16px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.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 ---------- */
.hero {
  position: relative;
  padding: 178px 0 120px;
  background: linear-gradient(180deg, #eef5ff 0%, #f7faff 60%, #ffffff 100%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.22), transparent 65%);
  top: -200px;
  right: -120px;
}

.hero::after {
  content: "";
  position: absolute;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 111, 255, 0.16), transparent 65%);
  bottom: -220px;
  left: -100px;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--primary-dark);
  padding: 7px 15px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sky);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.22);
}

.hero h1 {
  font-size: 54px;
  line-height: 1.18;
  color: var(--ink);
  font-weight: 800;
  margin: 22px 0 20px;
  letter-spacing: -0.5px;
}

.hero h1 em {
  font-style: normal;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  font-size: 18px;
  color: var(--muted);
  max-width: 520px;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 42px;
}

.hero-stats {
  display: flex;
  gap: 44px;
  flex-wrap: wrap;
}

.hero-stats .num {
  font-size: 30px;
  font-weight: 800;
  color: var(--ink);
  line-height: 1;
}

.hero-stats .num span {
  color: var(--primary);
}

.hero-stats .label {
  font-size: 13px;
  color: var(--muted);
  margin-top: 6px;
}

/* Hero 视觉卡片 */
.hero-visual {
  position: relative;
  min-height: 420px;
}

.mockup {
  background: #fff;
  border-radius: 22px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  transform: rotate(-1.5deg);
}

.mockup-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 14px 18px;
  background: var(--primary-faint);
  border-bottom: 1px solid var(--line);
}

.mockup-bar i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #dbe6f5;
}

.mockup-bar i:nth-child(1) {
  background: #ff5f57;
}
.mockup-bar i:nth-child(2) {
  background: #febc2e;
}
.mockup-bar i:nth-child(3) {
  background: #28c840;
}

.mockup-body {
  padding: 26px;
}

.mockup-body .m-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
}

.m-logo {
  width: 108px;
  height: 16px;
  border-radius: 5px;
  background: linear-gradient(90deg, var(--primary), var(--sky));
}

.m-menu {
  display: flex;
  gap: 8px;
}
.m-menu span {
  width: 30px;
  height: 8px;
  border-radius: 4px;
  background: #e3ecf9;
}

.m-hero {
  height: 130px;
  border-radius: 14px;
  background: linear-gradient(135deg, #1e6fff, #38bdf8);
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 18px;
}

.m-hero::after {
  content: "";
  position: absolute;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  top: -60px;
  right: -30px;
}

.m-hero .m-btn {
  width: 88px;
  height: 26px;
  border-radius: 999px;
  background: #fff;
}

.m-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.m-grid .m-cell {
  height: 74px;
  border-radius: 12px;
  background: var(--primary-faint);
  border: 1px solid var(--line);
}

.float-chip {
  position: absolute;
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  animation: floaty 5s ease-in-out infinite;
}

.float-chip .ic {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  color: #fff;
}

.float-chip.c1 {
  top: 30px;
  left: -46px;
}
.float-chip.c1 .ic {
  background: var(--primary);
}
.float-chip.c2 {
  bottom: 46px;
  right: -30px;
  animation-delay: 1.4s;
}
.float-chip.c2 .ic {
  background: #10b981;
}

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

/* ---------- 通用 Section ---------- */
.section {
  padding: 92px 0;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 54px;
}

.section-head .kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 38px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -0.4px;
  margin-bottom: 14px;
}

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

.section-head.left {
  text-align: left;
  margin-left: 0;
}

/* ---------- 服务卡片 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.service-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 30px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: rgba(30, 111, 255, 0.3);
}

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

.service-icon {
  width: 60px;
  height: 60px;
  border-radius: 15px;
  background: var(--primary-soft);
  color: var(--primary);
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  transition: background 0.3s, color 0.3s, transform 0.3s;
}

.service-card:hover .service-icon {
  background: var(--grad);
  color: #fff;
  transform: rotate(-6deg) scale(1.05);
}

.service-card h3 {
  font-size: 19px;
  color: var(--ink);
  margin-bottom: 10px;
  font-weight: 700;
}

.service-card p {
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------- 特性/优势 ---------- */
.feature-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-item {
  text-align: center;
  padding: 28px 18px;
}

.feature-item .big {
  font-size: 34px;
  font-weight: 800;
  color: var(--ink);
  line-height: 1.2;
}

.feature-item .big span {
  color: var(--primary);
}

.feature-item .t {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 10px;
}

.feature-item .d {
  font-size: 13px;
  color: var(--muted);
  margin-top: 5px;
}

/* ---------- 案例卡片 ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.case-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.case-thumb {
  height: 210px;
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.9);
}

.case-thumb .tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
}

.case-body {
  padding: 22px 22px 26px;
  display: flex;
  flex-direction: column;
}

.case-body h3 {
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 8px;
}

.case-body p {
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 16px;
  flex: 1;
}

.case-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
}

.case-meta a,
.case-meta .more {
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

/* 案例色块 */
.thumb-blue {
  background: linear-gradient(135deg, #2563eb, #60a5fa);
}
.thumb-sky {
  background: linear-gradient(135deg, #0284c7, #7dd3fc);
}
.thumb-cyan {
  background: linear-gradient(135deg, #0891b2, #67e8f9);
}
.thumb-indigo {
  background: linear-gradient(135deg, #4f46e5, #a5b4fc);
}
.thumb-teal {
  background: linear-gradient(135deg, #0d9488, #5eead4);
}
.thumb-navy {
  background: linear-gradient(135deg, #1e3a8a, #64748b);
}

/* ---------- 筛选按钮 ---------- */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 9px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s;
}

.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.filter-btn.active {
  background: var(--grad);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 8px 18px rgba(30, 111, 255, 0.28);
}

/* ---------- 流程 Timeline ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 22px;
  position: relative;
}

.step {
  text-align: center;
  position: relative;
}

.step-num {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
}

.step:hover .step-num {
  background: var(--grad);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 12px 26px rgba(30, 111, 255, 0.32);
}

.step h4 {
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 6px;
}

.step p {
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 价格 ---------- */
.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.price-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.price-card.featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-md);
  transform: scale(1.03);
}

.price-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.price-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 999px;
  letter-spacing: 1px;
}

.price-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
  text-align: center;
}

.price-amount {
  text-align: center;
  margin: 14px 0 22px;
}

.price-amount .cur {
  font-size: 22px;
  color: var(--ink);
  font-weight: 700;
  vertical-align: top;
}

.price-amount .val {
  font-size: 52px;
  font-weight: 800;
  color: var(--ink);
  line-height: 1;
  letter-spacing: -1px;
}

.price-amount .unit {
  font-size: 14px;
  color: var(--muted);
}

.price-feats {
  flex: 1;
  margin-bottom: 26px;
}

.price-feats li {
  padding: 9px 0;
  font-size: 14.5px;
  color: var(--text);
  border-bottom: 1px dashed var(--line);
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.price-feats li::before {
  content: "✓";
  color: var(--primary);
  font-weight: 800;
  flex: none;
}

.price-feats li.na {
  color: #b7c2d6;
}
.price-feats li.na::before {
  content: "—";
  color: #cbd5e4;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
}

.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  font-family: inherit;
}

.faq-q .plus {
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: grid;
  place-items: center;
  font-weight: 700;
  transition: transform 0.3s, background 0.3s, color 0.3s;
}

.faq-item.open .plus {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-a p {
  padding: 0 24px 22px;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- 公告 / 新闻 ---------- */
.news-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.news-card {
  display: flex;
  gap: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.news-date {
  flex: none;
  width: 76px;
  height: 76px;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.news-date .d {
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
}
.news-date .m {
  font-size: 12px;
  font-weight: 600;
}

.news-body h3 {
  font-size: 17px;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.5;
}

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

.news-body .more {
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
}

.news-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}

/* ---------- 关于 / 团队 ---------- */
.about-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-copy h2 {
  font-size: 34px;
  color: var(--ink);
  margin-bottom: 18px;
}

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

.about-copy .checks {
  margin: 22px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.about-copy .checks li {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 15px;
  color: var(--ink);
  font-weight: 500;
}

.about-copy .checks li::before {
  content: "✓";
  width: 22px;
  height: 22px;
  flex: none;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 800;
}

.about-visual {
  border-radius: 24px;
  overflow: hidden;
  position: relative;
  min-height: 340px;
  background: linear-gradient(135deg, #1e6fff, #38bdf8);
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.about-visual .mono {
  font-size: 64px;
  font-weight: 800;
  letter-spacing: 2px;
  opacity: 0.9;
}

.about-visual .sub {
  font-size: 14px;
  letter-spacing: 6px;
  opacity: 0.85;
}

/* ---------- 联系信息 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.contact-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.contact-item .ic {
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary);
  display: grid;
  place-items: center;
}

.contact-item .label {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.contact-item .val {
  font-size: 16px;
  color: var(--ink);
  font-weight: 700;
  word-break: break-all;
}

/* ---------- CTA 横幅 ---------- */
.cta-band {
  background: var(--grad);
  border-radius: 24px;
  padding: 56px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-band::after {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  right: -80px;
  top: -120px;
}

.cta-band h2 {
  font-size: 30px;
  margin-bottom: 8px;
  position: relative;
  z-index: 2;
}

.cta-band p {
  opacity: 0.92;
  position: relative;
  z-index: 2;
}

.cta-band .btn {
  background: #fff;
  color: var(--primary-dark);
  position: relative;
  z-index: 2;
}

.cta-band .btn:hover {
  box-shadow: 0 16px 30px rgba(0, 0, 0, 0.18);
}

/* ---------- 页头 Banner（内页） ---------- */
.page-hero {
  padding: 156px 0 84px;
  background: linear-gradient(180deg, #eef5ff 0%, #f7faff 70%, #ffffff 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero h1 {
  font-size: 44px;
  color: var(--ink);
  font-weight: 800;
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}

.page-hero p {
  color: var(--muted);
  font-size: 17px;
  max-width: 620px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.breadcrumb {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}

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

/* ---------- 页脚 ---------- */
.site-footer {
  background: #0e1f3d;
  color: #c6d3ea;
  padding: 70px 0 0;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.3fr 1fr;
  gap: 40px;
  padding-bottom: 46px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand .brand-mark {
  width: 38px;
  height: 38px;
}

.footer-logo {
  height: 40px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  display: block;
}

.footer-qr {
  width: 120px;
  height: 120px;
  object-fit: contain;
  display: block;
  background: #fff;
  border-radius: 8px;
  padding: 6px;
}

.footer-about {
  font-size: 14px;
  line-height: 1.9;
  max-width: 300px;
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 20px;
  font-weight: 700;
}

.footer-col ul li {
  margin-bottom: 12px;
  font-size: 14px;
}

.footer-col ul a {
  transition: color 0.2s;
}
.footer-col ul a:hover {
  color: #fff;
}

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

.footer-contact .k {
  color: #8fa3c8;
  flex: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: #8fa3c8;
}

.footer-bottom a {
  color: #8fa3c8;
  transition: color 0.2s;
}

.footer-bottom a:hover {
  color: #fff;
}

/* ---------- 动画 reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 42px;
  }
  .card-grid,
  .case-grid,
  .price-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .nav-links,
  .nav-cta .nav-phone {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 14px 4% 22px;
    box-shadow: var(--shadow-md);
    gap: 4px;
    align-items: stretch;
  }

  .nav-links.mobile-open a {
    padding: 13px 16px;
    border-radius: 10px;
  }

  .hero {
    padding: 150px 0 80px;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero h1 {
    font-size: 36px;
  }
  .hero-visual {
    min-height: 340px;
  }
  .float-chip.c1 {
    left: 6px;
  }
  .float-chip.c2 {
    right: 6px;
  }

  .section {
    padding: 68px 0;
  }
  .section-head h2 {
    font-size: 30px;
  }

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

@media (max-width: 600px) {
  .card-grid,
  .case-grid,
  .price-grid,
  .feature-row,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .steps {
    grid-template-columns: 1fr;
  }
  .price-card.featured {
    transform: none;
  }
  .hero h1 {
    font-size: 30px;
  }
  .hero-stats {
    gap: 26px;
  }
  .cta-band {
    padding: 40px 26px;
  }
  .page-hero h1 {
    font-size: 32px;
  }
}

/* ---------- 返回顶部按钮 ---------- */
.back-to-top {
  position: fixed;
  right: 28px;
  right: max(24px, calc((100vw - min(1180px, 92vw)) / 4 - 24px));
  bottom: 128px;
  z-index: 90;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  padding: 0;
  background: var(--grad);
  color: #fff;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(30, 111, 255, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease,
    box-shadow 0.3s ease;
}

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

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 30px rgba(30, 111, 255, 0.45);
}

@media (max-width: 600px) {
  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}