/* ============================================================
   珠海市清屿科技有限公司  ·  官网样式表
   设计基调：简约大气 / 留白充足 / 深靛蓝专业色 + 清透青蓝点缀
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root {
  /* 主色：深靛蓝（专业、稳重） */
  --c-primary: #123a6b;
  --c-primary-deep: #0a2444;
  --c-primary-soft: #eaf1fa;

  /* 辅助色：清透青蓝（呼应「清屿」意象） */
  --c-accent: #1e88c7;
  --c-accent-2: #35c4d7;
  --c-accent-soft: #e6f6fb;

  /* 中性色 */
  --c-ink: #0b1a2b;
  --c-body: #41536a;
  --c-muted: #7189a3;
  --c-bg: #ffffff;
  --c-bg-soft: #f5f8fc;
  --c-bg-soft-2: #eef4fb;
  --c-border: #e3eaf3;
  --c-border-strong: #cfdcec;

  /* 排版 */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    "Noto Sans CJK SC", sans-serif;
  --font-num: "Inter", "SF Mono", "Segoe UI", var(--font-sans);

  /* 尺寸 */
  --maxw: 1200px;
  --header-h: 74px;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;

  /* 阴影 */
  --sh-sm: 0 1px 2px rgba(11, 26, 43, 0.05);
  --sh-md: 0 6px 20px rgba(11, 26, 43, 0.07);
  --sh-lg: 0 18px 44px rgba(11, 26, 43, 0.12);
  --sh-blue: 0 14px 32px rgba(18, 58, 107, 0.22);

  /* 过渡 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-body);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5 {
  margin: 0;
  color: var(--c-ink);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.01em;
}

p {
  margin: 0;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

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

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

:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 3. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

.section {
  padding: 104px 0;
}

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

.section--tight {
  padding: 84px 0;
}

/* 章节标题组 */
.section-head {
  max-width: 720px;
  margin: 0 auto 56px;
  text-align: center;
}

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--c-primary-soft);
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-accent-2);
}

.section-title {
  font-size: clamp(28px, 3.4vw, 40px);
}

.section-desc {
  margin-top: 18px;
  font-size: 17px;
  color: var(--c-muted);
}

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    background-color 0.25s var(--ease), color 0.25s var(--ease),
    border-color 0.25s var(--ease);
}

.btn svg {
  width: 17px;
  height: 17px;
  flex: none;
  transition: transform 0.25s var(--ease);
}

.btn:hover svg {
  transform: translateX(3px);
}

.btn--primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: var(--sh-blue);
}

.btn--primary:hover {
  background: var(--c-primary-deep);
  transform: translateY(-2px);
  box-shadow: 0 20px 40px rgba(18, 58, 107, 0.3);
}

.btn--ghost {
  background: transparent;
  color: var(--c-primary);
  border: 1.5px solid var(--c-border-strong);
}

.btn--ghost:hover {
  border-color: var(--c-primary);
  background: var(--c-primary-soft);
  transform: translateY(-2px);
}

.btn--light {
  background: #fff;
  color: var(--c-primary);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.12);
}

.btn--light:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.18);
}

.btn--outline-light {
  border: 1.5px solid rgba(255, 255, 255, 0.42);
  color: #fff;
}

.btn--outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.8);
  transform: translateY(-2px);
}

.btn--sm {
  padding: 10px 20px;
  font-size: 14px;
}

/* 文字链接 */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-primary);
}

.link-arrow svg {
  width: 16px;
  height: 16px;
  transition: transform 0.25s var(--ease);
}

.link-arrow:hover svg {
  transform: translateX(4px);
}

/* ---------- 5. 顶部导航 ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  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: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease),
    background-color 0.3s var(--ease);
}

.header.is-stuck {
  border-bottom-color: var(--c-border);
  box-shadow: 0 4px 20px rgba(11, 26, 43, 0.06);
}

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

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: none;
}

.logo__mark {
  width: 38px;
  height: 38px;
  flex: none;
}

.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo__name {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-ink);
  letter-spacing: 0.01em;
}

.logo__sub {
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--c-muted);
  text-transform: uppercase;
}

/* 导航链接 */
.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav__link {
  position: relative;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-body);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav__link:hover {
  color: var(--c-primary);
  background: var(--c-bg-soft);
}

.nav__link.is-active {
  color: var(--c-primary);
  font-weight: 600;
}

.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 1px;
  transform: translateX(-50%);
  width: 18px;
  height: 2.5px;
  border-radius: 2px;
  background: var(--c-accent);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--c-border-strong);
  background: #fff;
}

.nav-toggle span {
  position: relative;
  display: block;
  width: 18px;
  height: 1.8px;
  background: var(--c-ink);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.8px;
  background: var(--c-ink);
  border-radius: 2px;
  transition: transform 0.3s var(--ease);
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.nav-toggle.is-open span {
  background: transparent;
}

.nav-toggle.is-open span::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-open span::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* 移动端下拉菜单 */
.mobile-menu {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  z-index: 99;
  padding: 12px 22px 26px;
  background: #fff;
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--sh-lg);
  transform: translateY(-12px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s var(--ease), transform 0.28s var(--ease),
    visibility 0.28s;
}

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

.mobile-menu__link {
  display: block;
  padding: 14px 4px;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  border-bottom: 1px solid var(--c-border);
}

.mobile-menu__link.is-active {
  color: var(--c-primary);
}

.mobile-menu .btn {
  margin-top: 20px;
  width: 100%;
}

/* ---------- 6. Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 96px) 0 116px;
  overflow: hidden;
  background: linear-gradient(180deg, #f7fafd 0%, #ffffff 62%);
}

/* 背景装饰 */
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero__bg::before {
  content: "";
  position: absolute;
  top: -220px;
  right: -160px;
  width: 640px;
  height: 640px;
  border-radius: 50%;
  background: radial-gradient(
    circle at 50% 50%,
    rgba(53, 196, 215, 0.16) 0%,
    rgba(53, 196, 215, 0) 68%
  );
}

.hero__bg::after {
  content: "";
  position: absolute;
  bottom: -300px;
  left: -180px;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(
    circle at 50% 50%,
    rgba(18, 58, 107, 0.1) 0%,
    rgba(18, 58, 107, 0) 70%
  );
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
      to right,
      rgba(18, 58, 107, 0.045) 1px,
      transparent 1px
    ),
    linear-gradient(to bottom, rgba(18, 58, 107, 0.045) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(
    ellipse 90% 70% at 50% 30%,
    #000 20%,
    transparent 78%
  );
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  gap: 64px;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 26px;
  padding: 7px 16px 7px 8px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--c-border);
  box-shadow: var(--sh-sm);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--c-body);
}

.hero__badge i {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--c-primary);
  color: #fff;
  font-size: 11.5px;
  font-weight: 700;
  font-style: normal;
  letter-spacing: 0.04em;
}

.hero__title {
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero__title em {
  font-style: normal;
  position: relative;
  color: var(--c-primary);
  white-space: nowrap;
}

.hero__title em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4px;
  height: 9px;
  border-radius: 4px;
  background: rgba(53, 196, 215, 0.3);
  z-index: -1;
}

.hero__lead {
  max-width: 560px;
  margin-top: 24px;
  font-size: 17.5px;
  line-height: 1.85;
  color: var(--c-body);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 34px;
  margin-top: 46px;
  padding-top: 30px;
  border-top: 1px solid var(--c-border);
}

.hero__meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--c-ink);
}

.hero__meta-item svg {
  width: 19px;
  height: 19px;
  color: var(--c-accent);
  flex: none;
}

/* Hero 视觉：抽象软件界面 */
.hero__visual {
  position: relative;
}

.vcard {
  position: relative;
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, #14406f 0%, #0a2444 100%);
  box-shadow: var(--sh-lg);
  overflow: hidden;
  color: #fff;
}

.vcard__bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
}

.vcard__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.28);
}

.vcard__dot:nth-child(1) {
  background: #ff6b6b;
}
.vcard__dot:nth-child(2) {
  background: #ffd166;
}
.vcard__dot:nth-child(3) {
  background: #4ade80;
}

.vcard__title {
  margin-left: 8px;
  font-size: 12.5px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.62);
  letter-spacing: 0.02em;
}

.vcard__body {
  padding: 22px;
}

.vcard__row {
  display: flex;
  align-items: flex-end;
  gap: 9px;
  height: 128px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.14);
}

.vcard__bar-v {
  flex: 1;
  border-radius: 5px 5px 2px 2px;
  background: linear-gradient(
    180deg,
    var(--c-accent-2) 0%,
    rgba(30, 136, 199, 0.55) 100%
  );
  opacity: 0.9;
}

.vcard__legend {
  display: flex;
  justify-content: space-between;
  margin-top: 14px;
  font-size: 11.5px;
  color: rgba(255, 255, 255, 0.5);
}

.vcard__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 20px;
}

.vcard__stat {
  padding: 13px 14px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.09);
}

.vcard__stat b {
  display: block;
  font-family: var(--font-num);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.vcard__stat span {
  font-size: 11.5px;
  color: rgba(255, 255, 255, 0.55);
}

/* 浮动小卡 */
.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 13px 17px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--c-border);
  box-shadow: var(--sh-lg);
}

.float-card--1 {
  top: -26px;
  left: -42px;
}

.float-card--2 {
  bottom: -30px;
  right: -30px;
}

.float-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  flex: none;
}

.float-card--1 .float-card__icon {
  background: var(--c-accent-soft);
  color: #0e7fa8;
}

.float-card--2 .float-card__icon {
  background: var(--c-primary-soft);
  color: var(--c-primary);
}

.float-card__icon svg {
  width: 19px;
  height: 19px;
}

.float-card b {
  display: block;
  font-size: 13.5px;
  color: var(--c-ink);
  line-height: 1.35;
}

.float-card span {
  font-size: 11.5px;
  color: var(--c-muted);
}

/* ---------- 7. 通用卡片网格 ---------- */
.grid {
  display: grid;
  gap: 24px;
}

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

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

.card:hover {
  transform: translateY(-5px);
  border-color: var(--c-border-strong);
  box-shadow: var(--sh-md);
}

.card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin-bottom: 22px;
  border-radius: 13px;
  background: linear-gradient(
    140deg,
    var(--c-primary-soft) 0%,
    var(--c-accent-soft) 100%
  );
  color: var(--c-primary);
}

.card__icon svg {
  width: 25px;
  height: 25px;
}

.card__title {
  font-size: 19px;
  margin-bottom: 12px;
}

.card__desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.card__list {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--c-border);
}

.card__list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--c-body);
}

.card__list li:last-child {
  margin-bottom: 0;
}

.card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-accent-2);
}

/* 序号卡（服务流程） */
.step {
  position: relative;
  padding: 34px 28px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--c-border);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

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

.step__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 20px;
  border-radius: 12px;
  background: var(--c-primary);
  color: #fff;
  font-family: var(--font-num);
  font-size: 17px;
  font-weight: 700;
}

.step__title {
  font-size: 18px;
  margin-bottom: 10px;
}

.step__desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 8. 数据条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: -40px;
  padding: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-border);
  box-shadow: var(--sh-md);
}

.stat {
  padding: 38px 26px;
  background: #fff;
  text-align: center;
}

.stat__num {
  font-family: var(--font-num);
  font-size: clamp(30px, 3.6vw, 42px);
  font-weight: 700;
  color: var(--c-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.stat__num small {
  font-size: 0.5em;
  margin-left: 2px;
  font-weight: 600;
}

.stat__label {
  margin-top: 10px;
  font-size: 14.5px;
  color: var(--c-muted);
}

/* ---------- 9. 双栏图文 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.split__title {
  font-size: clamp(26px, 3vw, 34px);
}

.split__text {
  margin-top: 20px;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--c-body);
}

.split__text + .split__text {
  margin-top: 16px;
}

/* 要点列表 */
.checklist {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15.5px;
  color: var(--c-body);
  line-height: 1.7;
}

.checklist svg {
  width: 21px;
  height: 21px;
  flex: none;
  margin-top: 2px;
  color: var(--c-accent);
}

/* 视觉块：协作拼图 */
.visual-tiles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.tile {
  padding: 26px 24px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--c-border);
  box-shadow: var(--sh-sm);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

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

.tile:nth-child(2),
.tile:nth-child(3) {
  transform: translateY(22px);
}

.tile:nth-child(2):hover,
.tile:nth-child(3):hover {
  transform: translateY(18px);
}

.tile__icon {
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  border-radius: 11px;
  background: var(--c-primary-soft);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tile__icon svg {
  width: 21px;
  height: 21px;
}

.tile b {
  display: block;
  font-size: 15.5px;
  color: var(--c-ink);
  margin-bottom: 6px;
}

.tile span {
  font-size: 13.5px;
  color: var(--c-muted);
  line-height: 1.7;
}

/* ---------- 10. 行业标签 ---------- */
.chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
}

.chip {
  padding: 10px 22px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--c-border);
  font-size: 15px;
  font-weight: 500;
  color: var(--c-body);
  transition: all 0.25s var(--ease);
}

.chip:hover {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--sh-blue);
}

/* ---------- 11. 优势区（深色） ---------- */
.features-dark {
  position: relative;
  padding: 104px 0;
  background: linear-gradient(150deg, #123a6b 0%, #0a2444 100%);
  overflow: hidden;
}

.features-dark::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -120px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(53, 196, 215, 0.22) 0%,
    rgba(53, 196, 215, 0) 68%
  );
}

.features-dark .container {
  position: relative;
}

.features-dark .section-title {
  color: #fff;
}

.features-dark .section-desc {
  color: rgba(255, 255, 255, 0.68);
}

.features-dark .eyebrow {
  background: rgba(255, 255, 255, 0.12);
  color: #9fe4f0;
}

.fcard {
  padding: 30px 26px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.11);
  transition: background-color 0.3s var(--ease), transform 0.3s var(--ease),
    border-color 0.3s var(--ease);
}

.fcard:hover {
  background: rgba(255, 255, 255, 0.11);
  border-color: rgba(255, 255, 255, 0.24);
  transform: translateY(-4px);
}

.fcard__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 20px;
  border-radius: 12px;
  background: rgba(53, 196, 215, 0.16);
  color: #7fe0ee;
}

.fcard__icon svg {
  width: 23px;
  height: 23px;
}

.fcard__title {
  font-size: 17.5px;
  color: #fff;
  margin-bottom: 10px;
}

.fcard__desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.66);
}

/* ---------- 12. CTA 区 ---------- */
.cta {
  padding: 96px 0;
  text-align: center;
  background: linear-gradient(180deg, #f5f8fc 0%, #eaf1fa 100%);
}

.cta__title {
  font-size: clamp(27px, 3.4vw, 38px);
}

.cta__desc {
  max-width: 620px;
  margin: 18px auto 0;
  font-size: 17px;
  color: var(--c-muted);
}

.cta__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

/* ---------- 13. 页内横幅（关于页） ---------- */
.page-head {
  position: relative;
  padding: calc(var(--header-h) + 76px) 0 84px;
  background: linear-gradient(150deg, #123a6b 0%, #0a2444 100%);
  overflow: hidden;
}

.page-head::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -140px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(53, 196, 215, 0.2) 0%,
    rgba(53, 196, 215, 0) 68%
  );
}

.page-head__inner {
  position: relative;
  max-width: 760px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 22px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb span {
  color: rgba(255, 255, 255, 0.35);
}

.breadcrumb b {
  color: #fff;
  font-weight: 500;
}

.page-head__title {
  font-size: clamp(30px, 4vw, 46px);
  color: #fff;
}

.page-head__desc {
  margin-top: 20px;
  font-size: 17.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.72);
}

/* ---------- 14. 关于页：背景故事 ---------- */
.story__quote {
  margin-top: 34px;
  padding: 26px 30px;
  border-left: 3px solid var(--c-accent-2);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--c-primary-soft);
  font-size: 17px;
  font-weight: 500;
  color: var(--c-primary);
  line-height: 1.8;
}

/* 里程碑时间轴 */
.timeline {
  position: relative;
  margin-top: 8px;
  padding-left: 30px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--c-accent-2) 0%,
    var(--c-primary-soft) 100%
  );
}

.timeline__item {
  position: relative;
  padding-bottom: 30px;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--c-primary);
}

.timeline__year {
  font-family: var(--font-num);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--c-accent);
  letter-spacing: 0.04em;
}

.timeline__title {
  margin-top: 4px;
  font-size: 17px;
}

.timeline__desc {
  margin-top: 6px;
  font-size: 14.5px;
  color: var(--c-muted);
  line-height: 1.8;
}

/* ---------- 15. 价值观 ---------- */
.value {
  padding: 32px 28px;
  border-radius: var(--radius);
  background: var(--c-bg-soft);
  border: 1px solid transparent;
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.value:hover {
  background: #fff;
  border-color: var(--c-border);
  box-shadow: var(--sh-sm);
}

.value__k {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-accent);
  letter-spacing: 0.1em;
}

.value__title {
  margin: 10px 0 10px;
  font-size: 19px;
}

.value__desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 16. 页脚 ---------- */
.footer {
  padding: 74px 0 0;
  background: #08182b;
  color: rgba(255, 255, 255, 0.62);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 52px;
}

.footer__logo .logo__name {
  color: #fff;
}

.footer__logo .logo__sub {
  color: rgba(255, 255, 255, 0.45);
}

.footer__intro {
  margin-top: 20px;
  font-size: 14.5px;
  line-height: 1.85;
  max-width: 320px;
}

.footer__h {
  margin-bottom: 20px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
}

.footer__list li {
  margin-bottom: 12px;
  font-size: 14.5px;
}

.footer__list a:hover {
  color: #fff;
}

.footer__contact li {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  margin-bottom: 15px;
  font-size: 14.5px;
  line-height: 1.65;
}

.footer__contact svg {
  width: 17px;
  height: 17px;
  flex: none;
  margin-top: 3px;
  color: var(--c-accent-2);
}

.footer__bottom {
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.45);
}

.footer__bottom a:hover {
  color: #fff;
}

/* ---------- 17. 入场动画 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero__inner {
    gap: 44px;
  }
  .float-card--1 {
    left: -12px;
  }
  .float-card--2 {
    right: -8px;
  }
}

@media (max-width: 980px) {
  .nav {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .hero__inner,
  .split {
    grid-template-columns: 1fr;
    gap: 56px;
  }
  .hero {
    padding: calc(var(--header-h) + 64px) 0 88px;
  }
  .hero__visual {
    max-width: 520px;
  }
  .float-card--1 {
    top: -18px;
    left: -6px;
  }
  .float-card--2 {
    bottom: -18px;
    right: -6px;
  }
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 0;
  }
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
  }
  .section {
    padding: 80px 0;
  }
  .features-dark {
    padding: 80px 0;
  }
}

@media (max-width: 680px) {
  .container {
    padding: 0 20px;
  }
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
  .stats {
    grid-template-columns: 1fr;
  }
  .visual-tiles {
    grid-template-columns: 1fr;
  }
  .tile:nth-child(2),
  .tile:nth-child(3) {
    transform: none;
  }
  .tile:nth-child(2):hover,
  .tile:nth-child(3):hover {
    transform: translateY(-4px);
  }
  .card,
  .step {
    padding: 26px 22px;
  }
  .float-card--1 {
    display: none;
  }
  .float-card--2 {
    right: 0;
    bottom: -20px;
  }
  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer__bottom {
    justify-content: flex-start;
  }
  .hero__actions .btn,
  .cta__actions .btn {
    flex: 1 1 auto;
  }
  .section {
    padding: 66px 0;
  }
  .features-dark {
    padding: 66px 0;
  }
}

/* ---------- 19. 无障碍：减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}