/* ══════════════════════════════════════════════════════
   爱贝馨 企业官网样式
   设计语言：以纺织品的经纬织纹为核心视觉母题
   ══════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700;900&family=Noto+Sans+SC:wght@300;400;500;600;700&display=swap');

:root {
  --navy-deep: #0B1B33;
  --navy-mid: #132A4D;
  --navy-light: #1E3A63;
  --gold: #C9A961;
  --gold-bright: #E8C874;
  --gold-dim: #8A7645;
  --cream: #F5F1E6;
  --cream-dim: #B8AFA0;
  --line: rgba(201, 169, 97, 0.18);

  --font-display: 'Noto Serif SC', serif;
  --font-body: 'Noto Sans SC', sans-serif;

  --container-width: 1160px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--navy-deep);
  color: var(--cream);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

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

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ── 经纬织纹背景（核心视觉签名元素）───────────────────
   用重复的细斜线模拟布料织纹肌理，替代真实产品图占位 */
.weave-texture {
  background-image:
    repeating-linear-gradient(45deg, var(--line) 0px, var(--line) 1px, transparent 1px, transparent 14px),
    repeating-linear-gradient(-45deg, var(--line) 0px, var(--line) 1px, transparent 1px, transparent 14px);
}

.weave-panel {
  position: relative;
  background: var(--navy-mid);
  border: 1px solid var(--line);
  overflow: hidden;
}
.weave-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg, rgba(201,169,97,0.10) 0px, rgba(201,169,97,0.10) 1px, transparent 1px, transparent 16px),
    repeating-linear-gradient(-45deg, rgba(201,169,97,0.06) 0px, rgba(201,169,97,0.06) 1px, transparent 1px, transparent 16px);
  pointer-events: none;
}

/* ── 顶部导航 ───────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(11, 27, 51, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}
.logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cream);
}
.logo .sep { color: var(--gold); margin: 0 8px; font-weight: 300; }
.nav-links {
  display: flex;
  gap: 44px;
}
.nav-links a {
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--cream-dim);
  position: relative;
  padding: 4px 0;
  transition: color 0.25s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--gold-bright); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--gold);
}
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    top: 84px; left: 0; right: 0;
    background: var(--navy-deep);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--line);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }
  .nav-links.open { max-height: 400px; }
  .nav-links a { padding: 18px 32px; border-top: 1px solid var(--line); }
  .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(--gold); }
}

/* ── 通用区块 ───────────────────────────────────────── */
.section { padding: 120px 0; }
.section-tight { padding: 80px 0; }
.section-alt { background: var(--navy-mid); }

.eyebrow {
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 20px;
  display: inline-block;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--cream);
  line-height: 1.3;
}
h1 { font-size: clamp(36px, 5vw, 58px); font-weight: 900; }
h2 { font-size: clamp(28px, 3.4vw, 40px); }
h3 { font-size: 22px; }

.lead {
  font-size: 18px;
  color: var(--cream-dim);
  font-weight: 300;
  max-width: 620px;
}

.btn {
  display: inline-block;
  padding: 16px 40px;
  border: 1px solid var(--gold);
  color: var(--gold-bright);
  font-size: 14px;
  letter-spacing: 0.12em;
  transition: all 0.3s ease;
  position: relative;
}
.btn:hover { background: var(--gold); color: var(--navy-deep); }
.btn-solid {
  background: var(--gold);
  color: var(--navy-deep);
  font-weight: 500;
}
.btn-solid:hover { background: var(--gold-bright); border-color: var(--gold-bright); }

.divider {
  width: 48px;
  height: 1px;
  background: var(--gold);
  margin: 28px 0;
}

/* ── 网格与卡片 ─────────────────────────────────────── */
.grid { display: grid; gap: 32px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 860px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--navy-mid);
  border: 1px solid var(--line);
  padding: 40px 32px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}
.card:hover { border-color: var(--gold-dim); transform: translateY(-4px); }

.placeholder-img {
  aspect-ratio: 4/3;
  position: relative;
  background: linear-gradient(135deg, var(--navy-mid), var(--navy-light));
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.placeholder-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg, rgba(201,169,97,0.12) 0px, rgba(201,169,97,0.12) 1px, transparent 1px, transparent 12px),
    repeating-linear-gradient(-45deg, rgba(201,169,97,0.08) 0px, rgba(201,169,97,0.08) 1px, transparent 1px, transparent 12px);
}
.placeholder-img .ph-label {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.15em;
  color: var(--gold-dim);
  border: 1px solid var(--gold-dim);
  padding: 8px 18px;
  background: rgba(11,27,51,0.55);
}

/* ── 页脚 ───────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 64px 0 32px;
  background: var(--navy-deep);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}
@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}
.footer-col h4 {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--gold);
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}
.footer-col p, .footer-col li {
  font-size: 14px;
  color: var(--cream-dim);
  margin-bottom: 10px;
}
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--gold-dim);
  text-align: center;
  letter-spacing: 0.04em;
}

/* ── 淡入滚动动效 ───────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ── Hero 区块 ──────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 84px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 75% 30%, rgba(201,169,97,0.10), transparent 55%),
    var(--navy-deep);
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg, var(--line) 0px, var(--line) 1px, transparent 1px, transparent 22px),
    repeating-linear-gradient(-45deg, var(--line) 0px, var(--line) 1px, transparent 1px, transparent 22px);
  mask-image: linear-gradient(to bottom, black, transparent 85%);
}
.hero-content { position: relative; z-index: 1; }
.hero-meta {
  display: flex;
  gap: 40px;
  margin-top: 56px;
  flex-wrap: wrap;
}
.hero-meta .stat-num {
  font-family: var(--font-display);
  font-size: 30px;
  color: var(--gold);
  font-weight: 700;
}
.hero-meta .stat-label {
  font-size: 13px;
  color: var(--cream-dim);
  letter-spacing: 0.06em;
  margin-top: 4px;
}

/* ── 面包屑式页首（非首页） ─────────────────────────── */
.page-hero {
  padding: 180px 0 80px;
  position: relative;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg, var(--line) 0px, var(--line) 1px, transparent 1px, transparent 22px),
    repeating-linear-gradient(-45deg, var(--line) 0px, var(--line) 1px, transparent 1px, transparent 22px);
  mask-image: radial-gradient(ellipse at top, black, transparent 70%);
}
.page-hero .container { position: relative; }

.tag-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.tag {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  border: 1px solid var(--gold-dim);
  padding: 6px 16px;
}

/* ══════════════════════════════════════════════════════
   智能客服聊天窗口
   ══════════════════════════════════════════════════════ */
#chat-toggle-btn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--gold);
  color: var(--navy-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(0,0,0,0.35);
  z-index: 200;
  transition: transform 0.25s ease, background 0.25s ease;
}
#chat-toggle-btn:hover { transform: scale(1.08); background: var(--gold-bright); }

#chat-window {
  position: fixed;
  bottom: 100px;
  right: 28px;
  width: 360px;
  max-width: calc(100vw - 40px);
  height: 480px;
  max-height: calc(100vh - 140px);
  background: var(--navy-mid);
  border: 1px solid var(--line);
  border-radius: 4px;
  box-shadow: 0 12px 48px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  z-index: 199;
  opacity: 0;
  transform: translateY(16px) scale(0.98);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
#chat-window.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

#chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--gold-bright);
  letter-spacing: 0.04em;
}
#chat-close-btn {
  background: none;
  border: none;
  color: var(--cream-dim);
  font-size: 16px;
  cursor: pointer;
  line-height: 1;
}
#chat-close-btn:hover { color: var(--gold-bright); }

#chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.chat-msg {
  font-size: 14px;
  line-height: 1.6;
  padding: 10px 14px;
  max-width: 85%;
  word-wrap: break-word;
}
.chat-msg-bot {
  background: var(--navy-light);
  color: var(--cream);
  align-self: flex-start;
  border-radius: 2px 12px 12px 12px;
}
.chat-msg-user {
  background: var(--gold);
  color: var(--navy-deep);
  align-self: flex-end;
  border-radius: 12px 2px 12px 12px;
}

#chat-input-row {
  display: flex;
  border-top: 1px solid var(--line);
  padding: 12px;
  gap: 8px;
}
#chat-input {
  flex: 1;
  background: var(--navy-deep);
  border: 1px solid var(--line);
  color: var(--cream);
  padding: 10px 14px;
  font-size: 14px;
  font-family: var(--font-body);
  outline: none;
}
#chat-input:focus { border-color: var(--gold-dim); }
#chat-input::placeholder { color: var(--cream-dim); }

#chat-send-btn {
  background: var(--gold);
  color: var(--navy-deep);
  border: none;
  padding: 0 18px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s ease;
}
#chat-send-btn:hover { background: var(--gold-bright); }

@media (max-width: 480px) {
  #chat-window { right: 16px; bottom: 90px; width: calc(100vw - 32px); }
  #chat-toggle-btn { right: 16px; bottom: 20px; }
}