/* ============================================================
   鹿 · 官网视觉系统 —— 奢华淡雅 · 浅色系
   ============================================================ */

:root {
  --ivory: #FAF7F2;        /* 象牙白底色 */
  --cream: #F3EDE4;        /* 米白过渡 */
  --blush: #E8DCD3;        /* 淡粉灰辅助 */
  --gold: #C6A875;         /* 香槟金点缀 */
  --gold-deep: #A98B5A;    /* 深香槟金 */
  --ink: #3D3428;          /* 墨灰棕文字 */
  --ink-soft: #7A6F5F;     /* 次要文字 */
  --white: #FFFFFF;

  --font-serif: "Songti SC", "STSong", "Noto Serif SC", "SimSun", serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", "Microsoft YaHei", sans-serif;

  --shadow-soft: 0 18px 50px -22px rgba(61, 52, 40, .28);
  --shadow-card: 0 10px 34px -18px rgba(61, 52, 40, .22);
  --radius: 14px;
  --nav-h: 76px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--ivory);
  color: var(--ink);
  line-height: 1.8;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

/* ---------- 通用区块 ---------- */
.section { padding: 118px 0; position: relative; }

.section-header { margin-bottom: 64px; }
.section-header.center { text-align: center; }

.section-eyebrow {
  font-size: 12px;
  letter-spacing: .55em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 18px;
  font-weight: 400;
}
.section-eyebrow.light { color: #E5D5B8; }

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 500;
  letter-spacing: .12em;
  line-height: 1.3;
}
.section-title.light { color: #FFFDF9; }

.section-subtitle {
  margin-top: 16px;
  color: var(--ink-soft);
  font-size: 15px;
  letter-spacing: .2em;
}

/* 金色细线分隔 */
.section-header::after { content: none; }
.section-header.center::after {
  content: "";
  display: block;
  width: 56px;
  height: 1px;
  margin: 26px auto 0;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

/* ---------- 滚动渐显 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity .9s ease, transform .9s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 44px;
  z-index: 100;
  transition: background .4s ease, box-shadow .4s ease;
}
.nav.scrolled {
  background: rgba(250, 247, 242, .88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(198, 168, 117, .22), var(--shadow-card);
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 26px;
  letter-spacing: .3em;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.nav-logo-en {
  font-family: var(--font-sans);
  font-size: 10px;
  letter-spacing: .42em;
  color: var(--gold-deep);
  font-weight: 400;
}

.nav-links { display: flex; gap: 42px; }
.nav-links a {
  font-size: 14px;
  letter-spacing: .22em;
  color: var(--ink);
  padding: 6px 2px;
  position: relative;
  transition: color .3s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 0;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width .35s ease, left .35s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--gold-deep); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; left: 0; }

.nav-toggle { display: none; }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url("assets/hero.png") center/cover no-repeat;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
    rgba(250, 247, 242, .96) 0%,
    rgba(250, 247, 242, .82) 34%,
    rgba(250, 247, 242, .25) 68%,
    rgba(250, 247, 242, 0) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
}

.hero-eyebrow {
  font-size: 13px;
  letter-spacing: .6em;
  color: var(--gold-deep);
  margin-bottom: 26px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(38px, 5.4vw, 64px);
  font-weight: 500;
  letter-spacing: .14em;
  line-height: 1.35;
  max-width: 640px;
}

.hero-subtitle {
  margin-top: 24px;
  font-size: 16px;
  letter-spacing: .3em;
  color: var(--ink-soft);
}

.hero-ctas { margin-top: 48px; display: flex; gap: 20px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 15px 42px;
  font-size: 14px;
  letter-spacing: .3em;
  border-radius: 2px;
  transition: all .35s ease;
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(120deg, var(--gold), var(--gold-deep));
  color: #FFFDF8;
  box-shadow: 0 12px 30px -12px rgba(169, 139, 90, .55);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 36px -12px rgba(169, 139, 90, .65);
}
.btn-ghost {
  border: 1px solid var(--gold);
  color: var(--gold-deep);
  background: rgba(255, 255, 255, .35);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: rgba(198, 168, 117, .12); transform: translateY(-3px); }

.hero-kuaishou {
  margin-top: 36px;
  font-size: 12px;
  letter-spacing: .34em;
  color: var(--ink-soft);
}

.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  width: 22px; height: 36px;
  margin-left: -11px;
  border: 1px solid rgba(169, 139, 90, .55);
  border-radius: 12px;
}
.hero-scroll span {
  position: absolute;
  top: 7px; left: 50%;
  width: 3px; height: 7px;
  margin-left: -1.5px;
  border-radius: 3px;
  background: var(--gold-deep);
  animation: scrollHint 1.8s ease-in-out infinite;
}
@keyframes scrollHint {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(13px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ---------- 关于鹿 ---------- */
.about { background: var(--ivory); }

.about-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 84px;
  align-items: center;
}

.about-visual { position: relative; }
.about-img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}
.about-frame {
  position: absolute;
  top: 26px; left: 26px;
  right: -26px; bottom: -26px;
  border: 1px solid rgba(198, 168, 117, .55);
  border-radius: var(--radius);
  z-index: -1;
}

.about-paragraphs p {
  color: var(--ink-soft);
  font-size: 15.5px;
  margin-bottom: 18px;
  text-align: justify;
}
.about-paragraphs p::first-letter { color: var(--gold-deep); }

.about-highlights {
  margin-top: 34px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 28px;
}
.about-highlights li {
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--ink);
  padding-left: 22px;
  position: relative;
}
.about-highlights li::before {
  content: "◆";
  position: absolute;
  left: 0;
  color: var(--gold);
  font-size: 10px;
  top: 2px;
}

/* ---------- 服务能力 ---------- */
.services {
  background:
    linear-gradient(rgba(243, 237, 228, .92), rgba(243, 237, 228, .92)),
    url("assets/texture.png") center/cover no-repeat;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.service-card {
  background: rgba(255, 255, 255, .72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(198, 168, 117, .28);
  border-radius: var(--radius);
  padding: 46px 42px 40px;
  box-shadow: var(--shadow-card);
  transition: transform .4s ease, box-shadow .4s ease, border-color .4s ease;
}
.service-card:hover {
  transform: translateY(-8px);
  border-color: rgba(198, 168, 117, .6);
  box-shadow: var(--shadow-soft);
}

.service-icon {
  font-size: 24px;
  color: var(--gold);
  margin-bottom: 20px;
  display: inline-block;
}
.service-card h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: .14em;
  margin-bottom: 16px;
}
.service-card p {
  font-size: 14.5px;
  color: var(--ink-soft);
  text-align: justify;
}
.service-proof {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(198, 168, 117, .3);
  font-size: 12.5px;
  letter-spacing: .22em;
  color: var(--gold-deep);
}

/* ---------- 数据战绩 ---------- */
.stats {
  background:
    linear-gradient(rgba(61, 52, 40, .82), rgba(74, 63, 48, .78)),
    url("assets/texture.png") center/cover no-repeat;
  color: #FFFDF9;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-bottom: 90px;
}

.stat-card {
  text-align: center;
  padding: 40px 20px;
  border: 1px solid rgba(229, 213, 184, .28);
  border-radius: var(--radius);
  background: rgba(255, 253, 249, .05);
  backdrop-filter: blur(4px);
  position: relative;
}
.stat-value {
  font-family: var(--font-serif);
  font-size: 46px;
  font-weight: 500;
  color: #EFDFC0;
  line-height: 1.1;
}
.stat-suffix { font-size: 24px; color: #E5D5B8; margin-left: 2px; }
.stat-label {
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: .24em;
  color: rgba(255, 253, 249, .82);
}
.stat-note {
  margin-top: 8px;
  font-size: 10.5px;
  letter-spacing: .14em;
  color: rgba(229, 213, 184, .55);
}

/* 时间线 */
.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  border-top: 1px solid rgba(229, 213, 184, .25);
  padding-top: 56px;
}
.timeline-item { position: relative; padding-top: 4px; }
.timeline-year {
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: .3em;
  color: var(--gold);
  margin-bottom: 8px;
}
.timeline-item h4 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: .12em;
  margin-bottom: 8px;
  color: #FFFDF9;
}
.timeline-item p {
  font-size: 13px;
  color: rgba(255, 253, 249, .68);
  line-height: 1.7;
}

/* ---------- 合作案例 ---------- */
.cases { background: var(--ivory); }

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 64px;
}

.case-card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid rgba(198, 168, 117, .2);
  padding: 40px 34px;
  box-shadow: var(--shadow-card);
  transition: transform .4s ease, box-shadow .4s ease;
  display: flex;
  flex-direction: column;
}
.case-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-soft); }

.case-brand {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: .1em;
}
.case-event {
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--ink-soft);
}
.case-result {
  margin: 22px 0 16px;
  font-family: var(--font-serif);
  font-size: 25px;
  color: var(--gold-deep);
  letter-spacing: .06em;
}
.case-detail {
  font-size: 13.5px;
  color: var(--ink-soft);
  text-align: justify;
  flex: 1;
}
.case-source {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid rgba(198, 168, 117, .28);
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--gold);
}

.cases-visual { text-align: center; }
.cases-img {
  max-width: 760px;
  margin: 0 auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

/* ---------- 行业认可 ---------- */
.endorsements {
  background:
    linear-gradient(rgba(250, 247, 242, .94), rgba(250, 247, 242, .94)),
    url("assets/texture.png") center/cover no-repeat;
}

.endorsements-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.endorsement-card {
  background: rgba(255, 255, 255, .8);
  border: 1px solid rgba(198, 168, 117, .25);
  border-radius: var(--radius);
  padding: 44px 36px;
  box-shadow: var(--shadow-card);
  position: relative;
}
.endorsement-card::before {
  content: "“";
  font-family: var(--font-serif);
  font-size: 68px;
  line-height: 1;
  color: rgba(198, 168, 117, .4);
  position: absolute;
  top: 20px; left: 26px;
}
.endorsement-card blockquote {
  font-size: 14.5px;
  color: var(--ink);
  text-align: justify;
  padding-top: 30px;
}
.endorsement-card cite {
  display: block;
  margin-top: 20px;
  font-style: normal;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold-deep);
}

/* ---------- 合作流程与联系 ---------- */
.contact { background: var(--ivory); }

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 72px;
}
.process-step {
  text-align: center;
  padding: 36px 26px;
}
.process-num {
  font-family: var(--font-serif);
  font-size: 40px;
  color: rgba(198, 168, 117, .5);
  line-height: 1;
}
.process-step h4 {
  margin: 16px 0 10px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: .18em;
}
.process-step p { font-size: 13.5px; color: var(--ink-soft); }

.contact-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.contact-card {
  background: var(--white);
  border: 1px solid rgba(198, 168, 117, .25);
  border-radius: var(--radius);
  padding: 32px 26px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform .35s ease, border-color .35s ease;
}
.contact-card:hover { transform: translateY(-6px); border-color: rgba(198, 168, 117, .6); }
.contact-label {
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--gold-deep);
  margin-bottom: 10px;
}
.contact-value {
  font-size: 14.5px;
  color: var(--ink);
  word-break: break-all;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--ink);
  color: rgba(250, 247, 242, .72);
  padding: 54px 0;
  text-align: center;
}
.footer-logo {
  font-family: var(--font-serif);
  font-size: 24px;
  letter-spacing: .4em;
  color: #EFDFC0;
}
.footer-logo span {
  font-family: var(--font-sans);
  font-size: 10px;
  letter-spacing: .45em;
  color: var(--gold);
  margin-left: 12px;
  vertical-align: middle;
}
.footer-copy {
  margin-top: 16px;
  font-size: 12px;
  letter-spacing: .12em;
  color: rgba(250, 247, 242, .45);
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .section { padding: 84px 0; }

  .about-grid { grid-template-columns: 1fr; gap: 56px; }
  .about-visual { max-width: 420px; margin: 0 auto; }

  .services-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: repeat(2, 1fr); gap: 34px; }
  .cases-grid, .endorsements-grid, .process-grid { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: repeat(2, 1fr); }

  .nav-links {
    position: fixed;
    top: var(--nav-h); right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(250, 247, 242, .97);
    backdrop-filter: blur(14px);
    width: 240px;
    padding: 18px 0;
    box-shadow: var(--shadow-soft);
    border-radius: 0 0 0 var(--radius);
    transform: translateX(100%);
    transition: transform .35s ease;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links li { text-align: center; }
  .nav-links a { display: block; padding: 13px 0; }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
  }
  .nav-toggle span {
    width: 24px; height: 1.5px;
    background: var(--ink);
    transition: all .3s;
  }
}

@media (max-width: 640px) {
  .container { padding: 0 22px; }
  .nav { padding: 0 22px; }

  .hero-title { letter-spacing: .08em; }
  .hero-ctas .btn { width: 100%; text-align: center; }

  .stats-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr; }
  .about-highlights { grid-template-columns: 1fr; }
  .stat-value { font-size: 40px; }
}