/* ===================================================================
   精英国度官网  ·  style.css
   主题色：深蓝 #1F3A5F  ·  古铜金 #B8956A  ·  宣纸米 #F8F4EC
   =================================================================== */

/* ---------- 设计令牌 ---------- */
:root {
  --brand: #1F3A5F;
  --brand-deep: #12253D;
  --brand-soft: #4A6B8A;
  --accent: #B8956A;
  --accent-deep: #8C6D4A;
  --ink: #1A2233;
  --ink-soft: #5C6678;
  --paper: #F8F4EC;
  --paper-soft: #EFE7D6;
  --line: #E8E0D2;
  --line-soft: #F0EBDF;
  --white: #FFFFFF;
  --shadow: 0 8px 30px rgba(31, 58, 95, .08);

  --max: 1240px;
  --gap: 28px;
  --radius: 6px;

  /* 国内站点不使用 Google Fonts，全部走系统字体栈 */
  --font-serif-cn: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', 'STSong', 'SimSun', Georgia, serif;
  --font-serif-en: Georgia, 'Times New Roman', 'Songti SC', serif;
  --font-sans-cn: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Hiragino Sans GB', sans-serif;
  --font-sans-en: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans-cn), var(--font-sans-en);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a { color: inherit; text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent); }

h1, h2, h3, h4 {
  font-family: var(--font-serif-cn), var(--font-serif-en);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: .02em;
  margin: 0;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif-en);
  font-size: 13px;
  letter-spacing: .35em;
  text-transform: uppercase;
  color: var(--accent-deep);
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 32px;
  height: 1px;
  background: var(--accent);
}

.section { padding: 110px 0; }
.section--tight { padding: 80px 0; }
.section--dark {
  background: linear-gradient(135deg, var(--brand-deep) 0%, var(--brand) 100%);
  color: var(--paper);
}
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--paper); }

.section-title {
  text-align: center;
  margin-bottom: 64px;
}
.section-title .eyebrow { margin-bottom: 18px; }
.section-title h2 {
  font-size: 44px;
  line-height: 1.25;
}
.section-title p {
  max-width: 660px;
  margin: 18px auto 0;
  color: var(--ink-soft);
}

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 244, 236, .92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
  flex-wrap: nowrap;
  gap: 12px;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav__brand img { height: 40px; }
.nav__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  white-space: nowrap;
}
.nav__brand-cn { font-family: var(--font-serif-cn); font-size: 18px; font-weight: 600; }
.nav__brand-en { display: none; }

.nav__menu {
  display: flex;
  gap: 22px;
  align-items: center;
  flex-wrap: nowrap;
  flex-shrink: 0;
  min-width: max-content;
}
.nav__menu a {
  position: relative;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink);
  padding: 6px 0;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav__menu a::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .25s;
}
.nav__menu a:hover::after,
.nav__menu a.active::after { transform: scaleX(1); }
.nav__menu a.active { color: var(--brand); }

.nav__phone {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--brand);
  color: var(--brand);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  transition: all .2s;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav__phone:hover { background: var(--brand); color: var(--paper); }

.nav__toggle {
  display: none;
  width: 40px; height: 40px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
}
.nav__toggle span {
  display: block; width: 20px; height: 2px; margin: 4px auto;
  background: var(--ink);
  transition: .25s;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .05em;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all .25s;
  border: 1px solid transparent;
}
.btn--primary {
  background: var(--brand);
  color: var(--paper);
}
.btn--primary:hover {
  background: var(--brand-deep);
  color: var(--paper);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(31, 58, 95, .25);
}
.btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: rgba(248, 244, 236, .5);
}
.btn--ghost:hover {
  background: var(--paper);
  color: var(--brand);
}
.btn--accent {
  background: var(--accent);
  color: var(--white);
}
.btn--accent:hover { background: var(--accent-deep); color: var(--white); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 720px;
  color: var(--paper);
  overflow: hidden;
  display: flex;
  align-items: center;
  background:
    radial-gradient(ellipse 600px 420px at 82% 18%, rgba(255, 255, 255, .12), transparent 60%),
    radial-gradient(ellipse 720px 500px at 12% 90%, rgba(184, 149, 106, .14), transparent 60%),
    linear-gradient(180deg,
      #e2efeb 0%,
      #c8dfda 9%,
      #6b8aa0 22%,
      #2c4a68 42%,
      #1F3A5F 62%,
      #12253D 100%);
}
.hero__bg {
  position: absolute; inset: 0;
  z-index: 0;
  display: none;
}
.hero__bg::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 80% 50%, transparent 0%, rgba(14, 27, 46, .4) 70%);
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 60px;
  align-items: center;
  padding: 120px 0 100px;
  width: 100%;
}
.hero__slogan-cn {
  font-family: var(--font-serif-cn);
  font-size: 64px;
  font-weight: 600;
  line-height: 1.2;
  margin: 22px 0 28px;
}
.hero__slogan-en {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 22px;
  color: var(--accent);
  margin-bottom: 28px;
  letter-spacing: .04em;
}
.hero__lead {
  font-size: 17px;
  line-height: 1.9;
  max-width: 540px;
  color: rgba(248, 244, 236, .85);
}
.hero__cta {
  margin-top: 48px;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.hero__visual {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(0, 0, 0, .35);
  background: url('../img/company/hero-office.jpg') center/contain no-repeat;
  background-color: var(--paper-soft);
}
.hero__visual::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(14, 27, 46, .6) 100%);
}
.hero__visual-tag {
  position: absolute;
  left: 24px; bottom: 24px;
  color: var(--paper);
  font-family: var(--font-serif-cn);
  font-size: 18px;
  letter-spacing: .05em;
  padding: 12px 18px;
  border-left: 2px solid var(--accent);
  background: rgba(14, 27, 46, .55);
  backdrop-filter: blur(8px);
}

.hero__stats {
  position: absolute;
  z-index: 2;
  left: 0; right: 0; bottom: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: rgba(14, 27, 46, .85);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(184, 149, 106, .3);
}
.hero__stat {
  text-align: center;
  padding: 26px 12px;
  border-right: 1px solid rgba(248, 244, 236, .12);
}
.hero__stat:last-child { border-right: 0; }
.hero__stat-num {
  font-family: var(--font-serif-en);
  font-size: 36px;
  color: var(--accent);
  line-height: 1;
}
.hero__stat-label {
  margin-top: 8px;
  font-size: 13px;
  color: rgba(248, 244, 236, .75);
  letter-spacing: .05em;
}

/* ---------- 服务 / 卡片网格 ---------- */
.grid {
  display: grid;
  gap: var(--gap);
}
.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 {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .25s;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.card__media {
  aspect-ratio: 16/10;
  background: var(--paper-soft) center/contain no-repeat;
  position: relative;
}
.card__body { padding: 28px; }
.card__meta {
  display: inline-block;
  font-family: var(--font-serif-en);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--accent-deep);
  margin-bottom: 10px;
}
.card h3 { font-size: 22px; margin-bottom: 10px; }
.card p { color: var(--ink-soft); font-size: 14.5px; margin: 0; }

.service-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all .25s;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--brand) 0%, var(--accent) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.service-card:hover::before { transform: scaleX(1); }
.service-card__icon {
  width: 64px; height: 64px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--paper);
  color: var(--brand);
  font-size: 28px;
  margin-bottom: 22px;
}
.service-card h3 { font-size: 21px; margin-bottom: 12px; }
.service-card p { color: var(--ink-soft); font-size: 14.5px; margin: 0 0 18px; }
.service-card .more {
  font-family: var(--font-serif-en);
  font-size: 13px;
  letter-spacing: .15em;
  color: var(--accent-deep);
}

/* ---------- 时间线 / 亮点 ---------- */
.value-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 36px;
  padding: 36px 0;
  border-top: 1px solid var(--line);
}
.value-row:last-child { border-bottom: 1px solid var(--line); }
.value-row__num {
  font-family: var(--font-serif-en);
  font-size: 56px;
  color: var(--accent);
  line-height: 1;
}
.value-row h3 { font-size: 24px; margin-bottom: 8px; }
.value-row p { color: var(--ink-soft); margin: 0; }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.split--reverse { direction: rtl; }
.split--reverse > * { direction: ltr; }
.split__media {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  aspect-ratio: 4/3;
  background: var(--paper-soft) center/contain;
}

/* ---------- 案例 ---------- */
.case-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all .25s;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
.case-card__media {
  aspect-ratio: 16/10;
  background: var(--paper-soft) center/contain no-repeat;
}
.case-card__body {
  padding: 24px 26px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.case-card__tag {
  display: inline-flex;
  align-self: flex-start;
  padding: 4px 12px;
  background: var(--paper-soft);
  color: var(--accent-deep);
  font-size: 12px;
  letter-spacing: .1em;
  border-radius: 3px;
  margin-bottom: 14px;
}
.case-card h3 { font-size: 20px; margin-bottom: 10px; }
.case-card p { color: var(--ink-soft); font-size: 14px; margin: 0; }

/* ---------- 引言 / 数据 ---------- */
.quote {
  position: relative;
  padding: 80px 60px;
  text-align: center;
  background: var(--paper-soft);
  border-radius: 8px;
}
.quote__mark {
  font-family: var(--font-serif-en);
  font-size: 100px;
  color: var(--accent);
  line-height: .5;
  margin-bottom: 24px;
  opacity: .5;
}
.quote__text {
  font-family: var(--font-serif-cn);
  font-size: 28px;
  line-height: 1.7;
  max-width: 800px;
  margin: 0 auto 28px;
  color: var(--ink);
}
.quote__cite {
  font-family: var(--font-serif-en);
  font-style: italic;
  color: var(--accent-deep);
  letter-spacing: .05em;
}

.cta-band {
  background: linear-gradient(135deg, var(--brand-deep) 0%, var(--brand) 100%);
  color: var(--paper);
  border-radius: 8px;
  padding: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}
.cta-band h3 { color: var(--paper); font-size: 30px; margin-bottom: 10px; }
.cta-band p { color: rgba(248, 244, 236, .8); margin: 0; }

/* ---------- 表单 ---------- */
.form { display: grid; gap: 18px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; }
.field label { font-size: 13px; color: var(--ink-soft); margin-bottom: 8px; letter-spacing: .05em; }
.field input, .field textarea, .field select {
  font-family: inherit;
  font-size: 15px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
  transition: border-color .2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--brand);
}
.field textarea { min-height: 140px; resize: vertical; }

/* ---------- 微信二维码块 ---------- */
.qr-block {
  margin-top: 34px;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 22px;
  background: var(--paper-soft);
  border-radius: 6px;
  border: 1px solid var(--line);
}
.qr-img {
  width: 128px;
  height: 128px;
  border-radius: 4px;
  background: #fff;
  padding: 6px;
  border: 1px solid var(--line);
  flex-shrink: 0;
}
.qr-caption {
  color: var(--ink);
  font-size: 15px;
  line-height: 1.7;
}
.qr-caption strong {
  display: block;
  font-size: 17px;
  color: var(--brand);
  margin-bottom: 4px;
}

@media (max-width: 960px) {
  .qr-block { flex-direction: column; text-align: center; gap: 14px; padding: 18px; }
  .qr-img { width: 110px; height: 110px; }
}

/* ---------- 信息块 ---------- */
.info-list { display: grid; gap: 0; }
.info-list__item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.info-list__item:last-child { border-bottom: 0; }
.info-list__label {
  font-family: var(--font-serif-en);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--accent-deep);
  text-transform: uppercase;
}
.info-list__value { color: var(--ink); font-size: 16px; }
.info-list__value a:hover { color: var(--brand); }

/* ---------- 页脚 ---------- */
.footer {
  background: var(--brand-deep);
  color: rgba(248, 244, 236, .75);
  padding: 80px 0 30px;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}
.footer__brand img { height: 44px; filter: brightness(0) invert(1); }
.footer__brand-text { color: var(--paper); font-family: var(--font-serif-cn); font-size: 20px; }
.footer__desc { font-size: 14px; line-height: 1.8; }
.footer h4 {
  color: var(--paper);
  font-size: 15px;
  margin-bottom: 22px;
  letter-spacing: .15em;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 12px; font-size: 14px; }
.footer a:hover { color: var(--accent); }
.footer__bottom {
  border-top: 1px solid rgba(248, 244, 236, .12);
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
}

/* ---------- 子页头图 ---------- */
.page-header {
  position: relative;
  padding: 130px 0 110px;
  background:
    linear-gradient(135deg, rgba(14, 27, 46, .80) 0%, rgba(31, 58, 95, .70) 100%),
    url('../img/banner/banner-1.jpg') center/cover no-repeat;
  color: var(--paper);
  overflow: hidden;
}
.page-header::before { content: none; }
.page-header__inner { position: relative; z-index: 1; }
.page-header .eyebrow { color: var(--accent); }

/* 底图自带文案，故主标上移、副标下移，中间让开底图文字区 */
.page-header h1 {
  color: var(--paper);
  font-size: 56px;
  margin: 8px 0 0;
  text-shadow: 0 2px 20px rgba(14, 27, 46, .7);
}
.page-header p {
  color: rgba(248, 244, 236, .9);
  max-width: 660px;
  margin: 72px 0 0;
  font-size: 16px;
  line-height: 1.8;
  text-shadow: 0 2px 14px rgba(14, 27, 46, .7);
}
.breadcrumb {
  display: flex;
  gap: 10px;
  font-size: 13px;
  color: rgba(248, 244, 236, .7);
  margin-bottom: 22px;
  letter-spacing: .05em;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--accent); }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed;
  right: 28px; bottom: 28px;
  width: 46px; height: 46px;
  background: var(--brand);
  color: var(--paper);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all .25s;
  box-shadow: var(--shadow);
  z-index: 50;
}
.to-top.show { opacity: 1; visibility: visible; }
.to-top:hover { background: var(--accent-deep); transform: translateY(-3px); }

/* ---------- 锚点偏移（避开 sticky 导航） ---------- */
section[id], div[id] { scroll-margin-top: 100px; }

/* ---------- 滚动入场 ---------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .8s, transform .8s; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .nav__phone { display: none; }
  .nav__menu { gap: 18px; }
  .nav__menu a { font-size: 13.5px; }
}

@media (min-width: 1400px) {
  .nav__brand-en { display: block; }
  .nav__menu { gap: 28px; }
}

@media (max-width: 960px) {
  .container { padding: 0 22px; }
  .section { padding: 80px 0; }
  .section-title h2 { font-size: 32px; }
  .section-title { margin-bottom: 44px; }

  .nav__menu, .nav__phone { display: none; }
  .nav__toggle { display: block; }
  .nav__menu.open {
    display: flex;
    flex-direction: column;
    gap: 18px;
    position: absolute;
    top: 78px; left: 0; right: 0;
    background: var(--paper);
    padding: 24px 28px 32px;
    border-bottom: 1px solid var(--line);
  }

  .hero { min-height: auto; }
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 80px 0 60px;
  }
  .hero__slogan-cn { font-size: 40px; }
  .hero__slogan-en { font-size: 17px; }
  .hero__visual { aspect-ratio: 16/10; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); position: static; }
  .hero__stat:nth-child(2) { border-right: 0; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 36px; }
  .split--reverse { direction: ltr; }
  .value-row { grid-template-columns: 1fr; gap: 12px; padding: 28px 0; }
  .value-row__num { font-size: 40px; }
  .page-header { padding: 100px 0 60px; }
  .page-header h1 { font-size: 38px; }

  .quote { padding: 50px 24px; }
  .quote__text { font-size: 20px; }

  .cta-band { flex-direction: column; align-items: flex-start; padding: 40px 28px; }
  .cta-band h3 { font-size: 24px; }
  .form__row { grid-template-columns: 1fr; }

  .footer__grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .footer__bottom { flex-direction: column; }

  .to-top { right: 16px; bottom: 16px; }
}

@media (max-width: 520px) {
  .footer__grid { grid-template-columns: 1fr; }
  .hero__slogan-cn { font-size: 32px; }
}