/* ============================================================
   江苏顺维数智科技有限公司 · 企业官网
   设计系统：深蓝 × 金色 · 瑞士现代主义 · B2B 服务美学
   ============================================================ */

:root {
  /* 色彩 */
  --navy-900: #06142b;
  --navy-800: #0b2545;
  --navy-700: #13315c;
  --navy-600: #1d4e89;
  --navy-500: #2f6fb2;
  --gold: #c9a227;
  --gold-light: #e3c566;
  --gold-dark: #a8861a;
  --ink: #14213d;
  --slate: #5a6b85;
  --slate-light: #8a97ad;
  --bg: #f6f8fb;
  --white: #ffffff;
  --line: #e4e9f1;
  --line-dark: rgba(255, 255, 255, 0.14);

  /* 圆角与阴影 */
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 4px 14px rgba(11, 37, 69, 0.06);
  --shadow: 0 14px 44px rgba(11, 37, 69, 0.1);
  --shadow-gold: 0 12px 34px rgba(201, 162, 39, 0.28);

  /* 字体与间距 */
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans SC", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, sans-serif;
  --container: 1200px;
  --nav-h: 76px;
}

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

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

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: 15px;
}

::selection {
  background: var(--gold);
  color: var(--navy-900);
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ---------- 通用容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.section {
  padding: 104px 0;
}

/* 锚点跳转时避开固定导航栏，避免标题被遮挡 */
section[id] {
  scroll-margin-top: calc(var(--nav-h) + 24px);
}

.section--tight {
  padding: 72px 0;
}

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

.section--navy {
  background: var(--navy-800);
  color: var(--white);
}

/* ---------- 板块标题 ---------- */
.sec-head {
  max-width: 720px;
  margin-bottom: 56px;
}

.sec-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.sec-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-dark);
  margin-bottom: 16px;
}

.sec-kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--gold);
  border-radius: 2px;
}

.sec-head--center .sec-kicker::after {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--gold);
  border-radius: 2px;
}

.sec-title {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--navy-800);
}

.sec-sub {
  margin-top: 16px;
  font-size: 16px;
  color: var(--slate);
}

.section--navy .sec-title {
  color: var(--white);
}

.section--navy .sec-sub {
  color: rgba(255, 255, 255, 0.72);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.28s ease;
  white-space: nowrap;
}

.btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.28s ease;
}

.btn:hover svg {
  transform: translateX(4px);
}

.btn--gold {
  background: linear-gradient(135deg, var(--gold-light), var(--gold) 55%, var(--gold-dark));
  color: var(--navy-900);
  box-shadow: var(--shadow-gold);
}

.btn--gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(201, 162, 39, 0.38);
}

.btn--ghost {
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  color: var(--white);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(4px);
}

.btn--ghost:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-2px);
}

.btn--outline {
  border: 1.5px solid var(--navy-600);
  color: var(--navy-700);
}

.btn--outline:hover {
  background: var(--navy-800);
  color: var(--white);
  transform: translateY(-2px);
}

.btn--block {
  width: 100%;
}

/* ---------- 导航栏 ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: var(--nav-h);
  transition: all 0.35s ease;
  background: rgba(11, 37, 69, 0.12);
  backdrop-filter: blur(0px);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(11, 37, 69, 0.08);
}

.header--light {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 1px 0 var(--line);
}

.header-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--navy-700), var(--navy-900));
  display: grid;
  place-items: center;
  color: var(--gold-light);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.02em;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15);
  transition: transform 0.3s ease;
}

.brand:hover .brand-mark {
  transform: rotate(-4deg) scale(1.05);
}

.brand-name {
  font-size: 19px;
  font-weight: 700;
  color: var(--navy-800);
  line-height: 1.2;
  letter-spacing: 0.02em;
  transition: color 0.3s ease;
}

.brand-sub {
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--slate-light);
  margin-top: 1px;
  transition: color 0.3s ease;
}

.header:not(.scrolled):not(.header--light) .brand-name {
  color: var(--white);
}

.header:not(.scrolled):not(.header--light) .brand-sub {
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- 品牌 Logo（页头 / 页脚） ---------- */
.brand-logo {
  display: block;
  height: 44px;
  width: auto;
  max-width: 100%;
  transition: filter 0.3s ease;
}

/* 深色背景（首页顶部未吸顶、页脚）时反白，保证 logo 清晰可辨 */
.header:not(.scrolled):not(.header--light) .brand-logo,
.footer .brand-logo {
  filter: brightness(0) invert(1);
}

/* 页脚 logo 带品牌语，留足高度使小字可读 */
.footer .brand-logo {
  height: 52px;
}

/* ---------- 联系电话（页头） ---------- */
.nav-phone {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 15px 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  white-space: nowrap;
  transition: all 0.28s ease;
}

.nav-phone-icon {
  width: 17px;
  height: 17px;
  flex: none;
  color: var(--gold-dark);
  transition: color 0.28s ease;
}

.nav-phone-text {
  display: flex;
  flex-direction: column;
  line-height: 1.16;
}

.nav-phone-label {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--slate-light);
  transition: color 0.3s ease;
}

.nav-phone-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--navy-800);
  letter-spacing: 0.01em;
  transition: color 0.3s ease;
}

.nav-phone:hover {
  border-color: var(--gold);
  background: rgba(201, 162, 39, 0.09);
}

.nav-phone:hover .nav-phone-icon {
  color: var(--gold);
}

/* 深色背景状态下的电话样式 */
.header:not(.scrolled):not(.header--light) .nav-phone {
  border-color: rgba(255, 255, 255, 0.28);
}

.header:not(.scrolled):not(.header--light) .nav-phone-icon {
  color: var(--gold-light);
}

.header:not(.scrolled):not(.header--light) .nav-phone-label {
  color: rgba(255, 255, 255, 0.6);
}

.header:not(.scrolled):not(.header--light) .nav-phone-num {
  color: var(--white);
}

.header:not(.scrolled):not(.header--light) .nav-phone:hover {
  border-color: var(--gold-light);
  background: rgba(227, 197, 102, 0.14);
}

/* ---------- 联系电话（页脚） ---------- */
.footer-contact a {
  color: rgba(255, 255, 255, 0.82);
  font-weight: 600;
  transition: color 0.25s ease;
}

.footer-contact a:hover {
  color: var(--gold-light);
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-links {
  display: flex;
  gap: 34px;
}

.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--slate);
  padding: 6px 2px;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--gold);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--navy-800);
}

.nav-link.active::after,
.nav-link:hover::after {
  transform: scaleX(1);
}

.header:not(.scrolled):not(.header--light) .nav-link {
  color: rgba(255, 255, 255, 0.78);
}

.header:not(.scrolled):not(.header--light) .nav-link:hover,
.header:not(.scrolled):not(.header--light) .nav-link.active {
  color: var(--white);
}

.nav-cta {
  padding: 10px 24px;
  font-size: 14px;
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--white);
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--navy-800);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.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（首页） ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: var(--white);
  background: radial-gradient(1100px 620px at 78% 12%, rgba(47, 111, 178, 0.55), transparent 60%),
    radial-gradient(900px 560px at 8% 92%, rgba(201, 162, 39, 0.16), transparent 55%),
    linear-gradient(150deg, var(--navy-900) 0%, var(--navy-800) 55%, var(--navy-700) 100%);
  overflow: hidden;
  padding-top: var(--nav-h);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 30% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 40%, #000 30%, transparent 75%);
}

.hero::after {
  content: "";
  position: absolute;
  width: 520px;
  height: 520px;
  right: -160px;
  bottom: -200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 162, 39, 0.28), transparent 62%);
  animation: float 9s ease-in-out infinite;
}

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

.hero-inner {
  position: relative;
  z-index: 2;
  padding: 88px 0 120px;
  max-width: 760px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(6px);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 30px;
  animation: fadeUp 0.9s 0.1s both;
}

.hero-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold-light);
  box-shadow: 0 0 12px var(--gold);
}

.hero h1 {
  font-size: clamp(38px, 5.4vw, 62px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0.01em;
  margin-bottom: 26px;
  animation: fadeUp 0.9s 0.22s both;
}

.hero h1 .gold {
  color: var(--gold-light);
}

.hero-desc {
  font-size: 18px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.78);
  max-width: 620px;
  margin-bottom: 40px;
  animation: fadeUp 0.9s 0.34s both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  animation: fadeUp 0.9s 0.46s both;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 36px;
  margin-top: 64px;
  padding-top: 34px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  animation: fadeUp 0.9s 0.58s both;
}

.hero-meta-item .num {
  font-size: 28px;
  font-weight: 800;
  color: var(--gold-light);
  line-height: 1.1;
}

.hero-meta-item .label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.62);
  margin-top: 4px;
  letter-spacing: 0.04em;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 通用页头（子页面） ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + 76px) 0 84px;
  color: var(--white);
  background: radial-gradient(760px 400px at 85% 0%, rgba(47, 111, 178, 0.5), transparent 60%),
    linear-gradient(150deg, var(--navy-900), var(--navy-700));
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
}

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

.crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 18px;
}

.crumbs a:hover {
  color: var(--gold-light);
}

.crumbs .sep {
  opacity: 0.5;
}

.page-hero h1 {
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 800;
  line-height: 1.2;
}

.page-hero p {
  margin-top: 14px;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.72);
  max-width: 640px;
}

/* ---------- 卡片（三大业务） ---------- */
.grid {
  display: grid;
  gap: 28px;
}

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

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

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

.card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow);
  border-color: rgba(201, 162, 39, 0.35);
}

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

.card-icon {
  width: 58px;
  height: 58px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  background: linear-gradient(135deg, rgba(29, 78, 137, 0.1), rgba(29, 78, 137, 0.04));
  color: var(--navy-600);
  transition: all 0.35s ease;
}

.card:hover .card-icon {
  background: linear-gradient(135deg, var(--navy-700), var(--navy-600));
  color: var(--gold-light);
  transform: scale(1.05) rotate(-3deg);
}

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

.card h3 {
  font-size: 21px;
  font-weight: 700;
  color: var(--navy-800);
  margin-bottom: 12px;
}

.card p {
  font-size: 14.5px;
  color: var(--slate);
  line-height: 1.8;
}

.card .tag {
  display: inline-block;
  margin-top: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--gold-dark);
}

.card .tag svg {
  width: 13px;
  height: 13px;
  vertical-align: -2px;
  margin-left: 3px;
}

.card-list {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-list li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  color: var(--slate);
}

.card-list li::before {
  content: "";
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  margin-top: 9px;
}

/* ---------- 数据统计 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stat-item {
  text-align: center;
  padding: 40px 20px;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}

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

.stat-num {
  font-size: clamp(34px, 4vw, 46px);
  font-weight: 800;
  color: var(--navy-800);
  line-height: 1.1;
}

.stat-num .unit {
  font-size: 0.55em;
  color: var(--gold-dark);
  margin-left: 2px;
}

.stat-label {
  margin-top: 10px;
  font-size: 14px;
  color: var(--slate);
  letter-spacing: 0.06em;
}

/* ---------- 品牌条 ---------- */
.brand-strip {
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 44px 0;
}

.brand-strip .sec-kicker {
  justify-content: center;
  margin-bottom: 8px;
}

.brand-strip .hint {
  text-align: center;
  font-size: 13px;
  color: var(--slate-light);
  margin-bottom: 30px;
}

.brand-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 18px;
}

.brand-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg);
  font-size: 15px;
  font-weight: 600;
  color: var(--navy-700);
  letter-spacing: 0.03em;
  transition: all 0.3s ease;
}

.brand-chip:hover {
  border-color: var(--gold);
  color: var(--gold-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.brand-chip .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- 特性/优势 ---------- */
.feature {
  display: flex;
  gap: 22px;
  padding: 30px 26px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}

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

.feature-num {
  font-size: 30px;
  font-weight: 800;
  color: rgba(201, 162, 39, 0.35);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.feature h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy-800);
  margin-bottom: 6px;
}

.feature p {
  font-size: 14px;
  color: var(--slate);
  line-height: 1.75;
}

/* ---------- 流程 ---------- */
.flow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
  counter-reset: flow;
}

.flow-step {
  position: relative;
  text-align: center;
  padding: 30px 16px 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all 0.3s ease;
}

.flow-step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(201, 162, 39, 0.4);
}

.flow-step .step-num {
  width: 40px;
  height: 40px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 15px;
  font-weight: 700;
  color: var(--gold-dark);
  background: rgba(201, 162, 39, 0.12);
  border: 1px solid rgba(201, 162, 39, 0.35);
}

.flow-step h5 {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy-800);
  margin-bottom: 6px;
}

.flow-step p {
  font-size: 12.5px;
  color: var(--slate);
  line-height: 1.6;
}

.flow-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -14px;
  width: 14px;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--gold) 0 4px, transparent 4px 7px);
}

/* ---------- 双栏内容 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.split-rev .split-media {
  order: -1;
}

.split-media {
  position: relative;
}

.media-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: linear-gradient(150deg, var(--navy-800), var(--navy-700));
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
}

.media-frame--gold {
  background: linear-gradient(150deg, var(--navy-700), var(--navy-900));
}

.media-art {
  color: rgba(255, 255, 255, 0.9);
  text-align: center;
  padding: 24px;
}

.media-art svg {
  width: 96px;
  height: 96px;
  margin: 0 auto 18px;
  color: var(--gold-light);
}

.media-art .t {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.media-art .s {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 6px;
}

.media-float {
  position: absolute;
  left: -26px;
  bottom: -26px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--line);
}

.media-float .num {
  font-size: 26px;
  font-weight: 800;
  color: var(--navy-800);
  line-height: 1;
}

.media-float .num small {
  font-size: 13px;
  color: var(--gold-dark);
}

.media-float .label {
  font-size: 12.5px;
  color: var(--slate);
  line-height: 1.5;
}

.split-body h2 {
  font-size: clamp(26px, 3.2vw, 36px);
  font-weight: 700;
  color: var(--navy-800);
  line-height: 1.3;
  margin-bottom: 18px;
}

.split-body h2 .gold {
  color: var(--gold-dark);
}

.split-body > p {
  font-size: 15.5px;
  color: var(--slate);
  line-height: 1.9;
  margin-bottom: 26px;
}

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

.check-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 15px;
  color: var(--ink);
}

.check-list li svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--gold-dark);
  margin-top: 3px;
}

.check-list li span b {
  color: var(--navy-800);
}

.check-list li span small {
  display: block;
  color: var(--slate);
  font-size: 13.5px;
}

/* ---------- 时间线 ---------- */
.timeline {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 162, 39, 0.15));
}

.tl-item {
  position: relative;
  padding: 0 0 44px 34px;
}

.tl-item:last-child {
  padding-bottom: 0;
}

.tl-item::before {
  content: "";
  position: absolute;
  left: -40px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.16);
}

.tl-item .date {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold-dark);
  margin-bottom: 6px;
}

.tl-item h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy-800);
  margin-bottom: 8px;
}

.tl-item p {
  font-size: 14.5px;
  color: var(--slate);
  line-height: 1.8;
}

/* ---------- 价值卡 ---------- */
.value-card {
  text-align: center;
  padding: 44px 28px;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}

.value-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(201, 162, 39, 0.35);
}

.value-card .icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(201, 162, 39, 0.16), rgba(201, 162, 39, 0.05));
  color: var(--gold-dark);
}

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

.value-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy-800);
  margin-bottom: 10px;
}

.value-card p {
  font-size: 14px;
  color: var(--slate);
  line-height: 1.75;
}

/* ---------- 产品明细区块 ---------- */
.prod-block {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.prod-block:hover {
  box-shadow: var(--shadow);
}

.prod-head {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 32px 36px;
  background: linear-gradient(135deg, rgba(29, 78, 137, 0.06), rgba(29, 78, 137, 0.02));
  border-bottom: 1px solid var(--line);
}

.prod-head .idx {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--navy-700), var(--navy-900));
  color: var(--gold-light);
  font-size: 20px;
  font-weight: 800;
}

.prod-head h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--navy-800);
}

.prod-head p {
  font-size: 13.5px;
  color: var(--slate);
  margin-top: 2px;
}

.prod-body {
  padding: 32px 36px;
}

.prod-sub {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 26px;
}

.prod-sub:last-child {
  margin-bottom: 0;
}

.prod-sub-item {
  padding: 22px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}

.prod-sub-item:hover {
  transform: translateY(-3px);
  border-color: rgba(201, 162, 39, 0.4);
  background: var(--white);
}

.prod-sub-item h5 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--navy-800);
  margin-bottom: 8px;
}

.prod-sub-item h5 svg {
  width: 17px;
  height: 17px;
  color: var(--gold-dark);
}

.prod-sub-item p {
  font-size: 13.5px;
  color: var(--slate);
  line-height: 1.75;
}

.prod-note {
  margin-top: 18px;
  padding: 14px 20px;
  border-radius: 10px;
  background: rgba(201, 162, 39, 0.08);
  border-left: 3px solid var(--gold);
  font-size: 13.5px;
  color: var(--navy-700);
  line-height: 1.7;
}

/* ---------- 品牌大图 ---------- */
.brand-card {
  text-align: center;
  padding: 34px 20px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}

.brand-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: rgba(201, 162, 39, 0.35);
}

.brand-card .logo {
  width: 64px;
  height: 64px;
  margin: 0 auto 14px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 800;
  color: var(--white);
  background: linear-gradient(135deg, var(--navy-600), var(--navy-800));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.brand-card h5 {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy-800);
  margin-bottom: 4px;
}

.brand-card p {
  font-size: 12.5px;
  color: var(--slate);
  line-height: 1.6;
}

/* ---------- CTA ---------- */
.cta {
  position: relative;
  padding: 96px 0;
  background: radial-gradient(900px 500px at 20% 10%, rgba(47, 111, 178, 0.5), transparent 60%),
    linear-gradient(135deg, var(--navy-900), var(--navy-700));
  color: var(--white);
  text-align: center;
  overflow: hidden;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
}

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

.cta h2 {
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
}

.cta h2 .gold {
  color: var(--gold-light);
}

.cta p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  max-width: 560px;
  margin: 0 auto 38px;
}

.cta .btn-group {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 40px;
  align-items: start;
}

.info-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
}

.info-item {
  display: flex;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.info-item:last-child {
  border-bottom: none;
}

.info-item .icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(29, 78, 137, 0.1), rgba(29, 78, 137, 0.04));
  color: var(--navy-600);
}

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

.info-item h5 {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--slate-light);
  margin-bottom: 3px;
}

.info-item p,
.info-item a {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--navy-800);
  line-height: 1.6;
  word-break: break-all;
}

.info-item a:hover {
  color: var(--gold-dark);
}

.form-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field--full {
  grid-column: 1 / -1;
}

.form-field label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--navy-800);
}

.form-field label em {
  color: #c0392b;
  font-style: normal;
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: 13px 16px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  color: var(--ink);
  background: var(--bg);
  transition: all 0.25s ease;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--slate-light);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--gold);
  background: var(--white);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.12);
}

.form-field textarea {
  resize: vertical;
  min-height: 120px;
}

.form-tip {
  grid-column: 1 / -1;
  font-size: 12.5px;
  color: var(--slate-light);
}

.form-success {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 10px;
  background: rgba(52, 168, 83, 0.1);
  border: 1px solid rgba(52, 168, 83, 0.3);
  color: #1e7d43;
  font-size: 14px;
}

.form-success.show {
  display: block;
  animation: fadeUp 0.4s ease;
}

/* 提交失败态 */
.form-success.error {
  background: rgba(217, 74, 74, 0.1);
  border-color: rgba(217, 74, 74, 0.32);
  color: #b3261e;
}

/* 提交中按钮禁用态 */
.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--navy-900);
  color: rgba(255, 255, 255, 0.66);
  padding: 76px 0 0;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  gap: 48px;
  padding-bottom: 56px;
}

.footer .brand-name {
  color: var(--white);
}

.footer .brand-sub {
  color: rgba(255, 255, 255, 0.45);
}

.footer-desc {
  margin-top: 18px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.55);
  max-width: 320px;
}

.footer h5 {
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.55);
  transition: all 0.25s ease;
}

.footer-links a:hover {
  color: var(--gold-light);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
}

.footer-contact svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--gold);
  margin-top: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.42);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.42);
}

.footer-bottom a:hover {
  color: var(--gold-light);
}

/* ---------- 底部备案信息区（主体 / ICP / 公安备案 / 版权）---------- */
.footer-bottom .legal {
  display: flex;
  flex-direction: column;
  gap: 7px;
  width: 100%;
}

.footer-bottom .legal-line {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px 10px;
  line-height: 1.75;
}

/* 分隔竖线，仅作视觉弱化处理 */
.footer-bottom .legal-sep {
  opacity: 0.32;
}

/* 公安备案：徽标 + 编号 */
.footer-bottom .legal-ga {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.footer-bottom .legal-ga-icon {
  width: 13px;
  height: 13px;
  flex: none;
  opacity: 0.7;
}

/* ============================================================
   SAP 实施交付模块
   ============================================================ */

/* 深蓝底上的时间线：反转文字与节点颜色，保证对比度 */
.section--navy .timeline::before {
  background: linear-gradient(180deg, var(--gold-light), rgba(227, 197, 102, 0.12));
}

.section--navy .tl-item::before {
  background: var(--navy-800);
  border-color: var(--gold-light);
  box-shadow: 0 0 0 4px rgba(227, 197, 102, 0.18);
}

.section--navy .tl-item .date {
  color: var(--gold-light);
}

.section--navy .tl-item h4 {
  color: var(--white);
}

.section--navy .tl-item p {
  color: rgba(255, 255, 255, 0.74);
}

/* 阶段里程碑列表 */
.milestone-list {
  margin-top: 16px;
  gap: 9px;
}

.section--navy .milestone-list li {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.72);
}

.section--navy .milestone-list li::before {
  background: var(--gold-light);
}

/* 交付周期与成果物表格 */
.spec-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 30px 30px;
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}

.spec-table {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.spec-caption {
  caption-side: top;
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gold-dark);
  padding-bottom: 14px;
}

.spec-table thead th {
  text-align: left;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 700;
  color: var(--navy-800);
  background: rgba(29, 78, 137, 0.06);
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
}

.spec-table tbody th {
  text-align: left;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 600;
  color: var(--navy-800);
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.spec-table tbody td {
  padding: 14px;
  color: var(--slate);
  line-height: 1.7;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.spec-table tbody tr:last-child th,
.spec-table tbody tr:last-child td {
  border-bottom: none;
}

.spec-note {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--slate-light);
}

/* 区块内的按钮组 */
.section-cta {
  margin-top: 28px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* 首页 SAP 专项服务推荐条 */
.sap-entry {
  margin-top: 76px;
}

/* CTA 补充信息与商标声明 */
.cta-note {
  margin-top: 22px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.72);
}

.cta-note a {
  color: var(--gold-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.trademark-note {
  margin: 14px auto 0;
  max-width: 860px;
  font-size: 12px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.42);
}

/* ---------- 滚动渐入 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.8s cubic-bezier(0.22, 0.61, 0.36, 1),
    transform 0.8s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: opacity, transform;
}

.reveal.in {
  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; }

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html { scroll-behavior: auto; }
}

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--navy-800);
  color: var(--gold-light);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: all 0.35s ease;
  z-index: 900;
}

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

.to-top:hover {
  background: var(--navy-700);
  transform: translateY(-3px);
}

.to-top svg {
  width: 18px;
  height: 18px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: repeat(3, 1fr); }
  .flow-step:nth-child(3)::after { display: none; }
  .prod-sub { grid-template-columns: 1fr 1fr; }

  /* 主导航增加至 5 项，收紧间距避免与电话/CTA 挤在一行 */
  .nav-links { gap: 22px; }
  .nav-link { font-size: 14px; }
}

@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    width: 100%;
    flex-direction: column;
    gap: 0;
    background: var(--white);
    box-shadow: 0 24px 40px rgba(11, 37, 69, 0.14);
    padding: 12px 28px 20px;
    transform: translateY(-16px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.32s ease;
  }

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

  .nav-link {
    padding: 15px 2px;
    border-bottom: 1px solid var(--line);
    color: var(--navy-800) !important;
  }

  .nav-link::after { display: none; }

  .nav-cta { display: none; }

  .nav-toggle { display: flex; }

  /* Logo 与电话在平板/手机端的适配 */
  .brand-logo { height: 34px; }

  .footer .brand-logo { height: 42px; }

  .header-inner { gap: 16px; }

  .grid--3,
  .grid--2 { grid-template-columns: 1fr; }

  .split { grid-template-columns: 1fr; gap: 48px; }
  .split-rev .split-media { order: 0; }

  .contact-grid { grid-template-columns: 1fr; }
  .section { padding: 76px 0; }

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

@media (max-width: 620px) {
  .container { padding: 0 20px; }

  .brand-logo { height: 28px; }

  .footer .brand-logo { height: 36px; }

  /* 备案信息：小屏改为竖排，隐藏分隔符，避免折行错乱 */
  .footer-bottom .legal-line {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .footer-bottom .legal-sep { display: none; }

  /* 小屏空间有限：联系电话收敛为图标按钮，完整号码保留在 aria-label 与页脚 */
  .nav-phone {
    width: 40px;
    height: 40px;
    padding: 0;
    justify-content: center;
  }

  .nav-phone-text { display: none; }

  .nav-phone-icon { width: 19px; height: 19px; }

  .grid--4 { grid-template-columns: 1fr; }

  /* SAP 模块：交付周期表格在小屏横向滚动，避免挤压换行 */
  .spec-card { padding: 24px 18px 22px; }
  .spec-table { min-width: 420px; font-size: 13.5px; }
  .spec-table thead th,
  .spec-table tbody th,
  .spec-table tbody td { padding: 11px 10px; }
  .milestone-list { margin-top: 12px; }
  .trademark-note { font-size: 11.5px; }
  .sap-entry { margin-top: 48px; }
  .section-cta .btn { width: 100%; }

  .flow { grid-template-columns: 1fr; }
  .flow-step:not(:last-child)::after { display: none; }

  .prod-sub { grid-template-columns: 1fr; }
  .prod-head { padding: 24px; flex-direction: column; align-items: flex-start; }
  .prod-body { padding: 24px; }

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

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

  .hero-meta { gap: 24px; }
  .hero-actions .btn { width: 100%; }

  .media-float { left: 12px; bottom: -20px; padding: 14px 16px; }
}