@charset "UTF-8";

/* ==========================================================================
   【漆器描金风】通义千问AI官方网站样式
   色彩体系：
     主色漆黑：#0D0D0D (凝脂黑漆、深沉如镜)
     辅色描金：#D4AF37 (赤金澄澈、泥金璀璨)
     点缀螺钿彩：#7FD4C1 (青蓝紫幻彩、极光贝贝壳虹霓)
     背景深棕：#2C1810 (老红木重漆、沉香檀紫)
   核心意象：
     黑生深漆光、泥金细线勾勒缠枝、螺钿虹彩微泛珠光、雍容华贵奢侈品定制
   ========================================================================== */

:root {
  --color-lacquer-black: #0D0D0D;
  --color-lacquer-pure: #050505;
  --color-lacquer-card: rgba(20, 16, 15, 0.88);
  --color-gold: #D4AF37;
  --color-gold-light: #F3E5AB;
  --color-gold-dark: #997A15;
  --color-gold-dim: rgba(212, 175, 55, 0.35);
  --color-nacre-cyan: #7FD4C1;
  --color-nacre-purple: #B388FF;
  --color-nacre-light: #A7FFEB;
  --color-wood-brown: #2C1810;
  --color-wood-deep: #1A0D08;
  --color-text-white: #FAF6ED;
  --color-text-muted: #C5BAA8;
  --color-text-dim: #8E8272;
  --border-gold: rgba(212, 175, 55, 0.45);
  --border-nacre: rgba(127, 212, 193, 0.4);
  --font-serif: "Cinzel", "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", SimSun, STSong, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --shadow-gold: 0 10px 36px rgba(212, 175, 55, 0.18);
  --shadow-nacre: 0 12px 38px rgba(127, 212, 193, 0.2);
  --shadow-deep: 0 16px 48px rgba(0, 0, 0, 0.8);
  --transition: all 0.38s cubic-bezier(0.25, 1, 0.5, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-serif);
  background-color: var(--color-lacquer-black);
  color: var(--color-text-white);
  line-height: 1.85;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  /* 深邃黑漆与老红木深棕底色 */
  background-image: 
    radial-gradient(circle at 12% 18%, rgba(212, 175, 55, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 88% 82%, rgba(127, 212, 193, 0.08) 0%, transparent 50%),
    linear-gradient(135deg, #0D0D0D 0%, #1A0F0A 40%, #2C1810 80%, #0D0D0D 100%);
  background-attachment: fixed;
}

/* 漆器黑亮反光与金丝缠枝微网底 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(212, 175, 55, 0.06) 0%, transparent 60%),
    repeating-linear-gradient(
      45deg,
      rgba(212, 175, 55, 0.015) 0px,
      rgba(212, 175, 55, 0.015) 1px,
      transparent 1px,
      transparent 28px
    );
  pointer-events: none;
  z-index: 0;
}

/* 螺钿镶嵌彩光幻动浮层 */
.nacre-luster-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.nacre-shimmer {
  position: absolute;
  border-radius: 50%;
  filter: blur(48px);
  opacity: 0.18;
  mix-blend-mode: screen;
  animation: nacreRainbow 18s ease-in-out infinite alternate;
}

.nacre-shimmer:nth-child(1) {
  top: -10%;
  left: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--color-nacre-cyan) 0%, var(--color-nacre-purple) 60%, transparent 80%);
  animation-duration: 16s;
}

.nacre-shimmer:nth-child(2) {
  bottom: 10%;
  right: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-gold) 0%, var(--color-nacre-cyan) 50%, transparent 80%);
  animation-duration: 22s;
  animation-delay: -5s;
}

@keyframes nacreRainbow {
  0% {
    transform: translate(0, 0) scale(1) rotate(0deg);
    filter: blur(48px) hue-rotate(0deg);
  }
  50% {
    transform: translate(-30px, 40px) scale(1.15) rotate(45deg);
    filter: blur(56px) hue-rotate(40deg);
  }
  100% {
    transform: translate(40px, -20px) scale(0.95) rotate(-30deg);
    filter: blur(44px) hue-rotate(-30deg);
  }
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   顶部导航 — 描金金丝梁，与下方功能模块一一对应
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 13, 13, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-gold);
  box-shadow: 0 6px 26px rgba(0, 0, 0, 0.7);
  transition: var(--transition);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo img {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  border: 2px solid var(--color-gold);
  box-shadow: 0 0 16px rgba(212, 175, 55, 0.45);
  background: #000;
  padding: 2px;
  object-fit: contain;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-gold-light);
  letter-spacing: 2px;
  display: flex;
  align-items: center;
  gap: 8px;
  text-shadow: 0 0 10px rgba(212, 175, 55, 0.3);
}

.brand-tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold));
  color: #000;
  font-weight: 700;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 10px;
}

.nav-links a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border-radius: 4px;
  transition: var(--transition);
  position: relative;
  letter-spacing: 1px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-gold-light);
  background: rgba(212, 175, 55, 0.1);
  text-shadow: 0 0 8px rgba(212, 175, 55, 0.5);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 20%;
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}

/* ==========================================================================
   Hero 首屏 + 下载区 (零滚动即可转化，黑漆金髹)
   ========================================================================== */
.hero-section {
  padding: 40px 0 24px;
  text-align: center;
  position: relative;
}

.lacquer-crest {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 24px;
  background: rgba(20, 16, 15, 0.9);
  border: 1px solid var(--border-gold);
  border-radius: 30px;
  color: var(--color-gold-light);
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 2.5px;
  box-shadow: 0 0 20px rgba(212, 175, 55, 0.2);
}

.crest-gem {
  color: var(--color-nacre-cyan);
  text-shadow: 0 0 10px var(--color-nacre-cyan);
}

.hero-title {
  font-size: 2.15rem;
  font-weight: 700;
  color: var(--color-gold-light);
  line-height: 1.35;
  margin-bottom: 14px;
  letter-spacing: 2px;
  text-shadow: 0 2px 14px rgba(212, 175, 55, 0.25);
}

.hero-subtitle {
  font-size: 1.34rem;
  color: var(--color-nacre-cyan);
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  text-shadow: 0 0 12px rgba(127, 212, 193, 0.4);
}

.hero-subtitle::before,
.hero-subtitle::after {
  content: "— ✦ 金髹玉嵌 · 智汇臻品 ✦ —";
  font-size: 0.86rem;
  color: var(--color-gold);
  font-weight: 500;
  letter-spacing: 1px;
}

.hero-desc {
  max-width: 860px;
  margin: 0 auto 32px;
  font-size: 1.08rem;
  color: var(--color-text-muted);
  line-height: 1.85;
}

/* 并列 4 个下载入口卡片（黑漆描金螺钿卡片） */
.download-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 10px;
}

.download-card {
  background: var(--color-lacquer-card);
  border: 1px solid var(--border-gold);
  border-radius: 12px;
  padding: 26px 18px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-deep);
}

/* 金粉描绘金线顶边 */
.download-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-gold), var(--color-nacre-cyan), transparent);
}

.download-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-nacre-cyan);
  box-shadow: 0 16px 38px rgba(212, 175, 55, 0.25);
  background: rgba(30, 22, 20, 0.95);
}

.download-icon {
  font-size: 2.3rem;
  margin-bottom: 12px;
  display: inline-block;
  filter: drop-shadow(0 2px 8px rgba(212, 175, 55, 0.4));
}

.download-title {
  font-size: 1.16rem;
  font-weight: 700;
  color: var(--color-gold-light);
  margin-bottom: 6px;
  letter-spacing: 1.2px;
}

.download-text {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 18px;
  line-height: 1.5;
}

/* 泥金描边奢华按钮 */
.btn-lacquer {
  display: inline-block;
  width: 100%;
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: #000;
  background: linear-gradient(135deg, var(--color-gold-light) 0%, var(--color-gold) 60%, var(--color-gold-dark) 100%);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 4px 18px rgba(212, 175, 55, 0.35);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

/* 金粉流动光影 */
.btn-lacquer::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: 0.5s;
}

.btn-lacquer:hover {
  background: linear-gradient(135deg, #FFF0B8 0%, var(--color-gold-light) 60%, var(--color-gold) 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(212, 175, 55, 0.5);
}

.btn-lacquer:hover::after {
  left: 100%;
}

.btn-lacquer-secondary {
  background: rgba(20, 16, 15, 0.8);
  color: var(--color-gold-light);
  border: 1px solid var(--border-gold);
  box-shadow: none;
}

.btn-lacquer-secondary:hover {
  background: rgba(212, 175, 55, 0.15);
  color: #fff;
  border-color: var(--color-nacre-cyan);
}

/* ==========================================================================
   描金缠枝分割线（螺钿明珠贯穿）
   ========================================================================== */
.lacquer-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 46px auto;
  position: relative;
}

.lacquer-divider-line {
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, transparent, var(--border-gold), transparent);
}

.lacquer-divider-jewel {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 20px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-gold-light);
  background: rgba(20, 16, 15, 0.95);
  border: 1px solid var(--border-gold);
  border-radius: 20px;
  letter-spacing: 2px;
  box-shadow: 0 0 16px rgba(212, 175, 55, 0.2);
}

/* ==========================================================================
   四个功能模块统一版式：模块名 + 情绪化短标题 + 场景化功能点
   黑漆螺钿盒卡片 (lacquer-box)
   ========================================================================== */
.feature-section {
  padding: 24px 0;
}

.lacquer-box {
  display: flex;
  align-items: center;
  gap: 48px;
  background: var(--color-lacquer-card);
  border: 1px solid var(--border-gold);
  border-radius: 16px;
  padding: 44px;
  box-shadow: var(--shadow-deep);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

/* 金粉描边与螺钿角标 */
.lacquer-box::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 90px;
  height: 90px;
  background: radial-gradient(circle at top right, rgba(127, 212, 193, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.lacquer-box:hover {
  border-color: var(--color-gold);
  transform: translateY(-4px);
  box-shadow: 0 16px 44px rgba(212, 175, 55, 0.22);
}

.lacquer-box.reverse {
  flex-direction: row-reverse;
}

.feature-content {
  flex: 1;
}

.module-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(212, 175, 55, 0.15);
  color: var(--color-gold-light);
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: 4px;
  border-left: 3px solid var(--color-gold);
  margin-bottom: 12px;
  letter-spacing: 1.5px;
}

.feature-title {
  font-size: 1.82rem;
  font-weight: 700;
  color: var(--color-gold-light);
  line-height: 1.35;
  margin-bottom: 8px;
  letter-spacing: 1.5px;
  text-shadow: 0 0 12px rgba(212, 175, 55, 0.2);
}

.feature-subtitle {
  font-size: 1.05rem;
  color: var(--color-nacre-cyan);
  font-weight: 700;
  margin-bottom: 22px;
  letter-spacing: 1.8px;
  text-shadow: 0 0 10px rgba(127, 212, 193, 0.3);
}

.scenario-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.scenario-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.98rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.scenario-bullet {
  color: var(--color-gold);
  font-size: 1.1rem;
  line-height: 1.6;
  text-shadow: 0 0 6px rgba(212, 175, 55, 0.5);
}

.scenario-item strong {
  color: var(--color-gold-light);
  font-weight: 700;
}

.feature-media {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.feature-media img {
  width: 100%;
  max-width: 520px;
  height: auto;
  border-radius: 10px;
  border: 1px solid var(--border-gold);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.85);
  transition: var(--transition);
  background-color: #000;
  object-fit: cover;
}

.lacquer-box:hover .feature-media img {
  transform: scale(1.02);
  border-color: var(--color-nacre-cyan);
  box-shadow: 0 12px 38px rgba(127, 212, 193, 0.3);
}

/* ==========================================================================
   网页版入口 — 零安装兜底，承接不愿下载的用户
   ========================================================================== */
.web-entry-section {
  padding: 32px 0 46px;
}

.web-entry-banner {
  background: linear-gradient(135deg, rgba(20, 16, 15, 0.95) 0%, rgba(44, 24, 16, 0.9) 100%);
  border: 1px solid var(--border-gold);
  border-radius: 16px;
  padding: 46px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-deep);
}

.web-entry-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--color-gold), var(--color-nacre-cyan), transparent);
}

.web-entry-title {
  font-size: 1.88rem;
  font-weight: 700;
  color: var(--color-gold-light);
  margin-bottom: 14px;
  letter-spacing: 1.8px;
}

.web-entry-desc {
  max-width: 820px;
  margin: 0 auto 28px;
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.web-entry-actions {
  display: flex;
  justify-content: center;
  gap: 20px;
  max-width: 440px;
  margin: 0 auto;
}

/* ==========================================================================
   网页版专属内容区 (web.html)
   ========================================================================== */
.chat-preview-box {
  max-width: 840px;
  margin: 32px auto 0;
  background: var(--color-lacquer-card);
  border: 1px solid var(--border-gold);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow-deep);
}

.chat-input-row {
  display: flex;
  gap: 12px;
}

.chat-input {
  flex: 1;
  padding: 14px 20px;
  border-radius: 6px;
  border: 1px solid var(--border-gold);
  background: rgba(10, 8, 8, 0.9);
  color: var(--color-text-white);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

.chat-input:focus {
  outline: none;
  border-color: var(--color-nacre-cyan);
  box-shadow: 0 0 0 3px rgba(127, 212, 193, 0.25);
}

.chat-input-row .btn-lacquer {
  width: auto;
  white-space: nowrap;
  padding: 14px 28px;
}

.web-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.web-step-card {
  background: var(--color-lacquer-card);
  border: 1px solid var(--border-gold);
  border-radius: 12px;
  padding: 28px 22px;
  text-align: center;
  box-shadow: var(--shadow-deep);
  position: relative;
}

.web-step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.15);
  color: var(--color-gold-light);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 14px;
  border: 1px solid var(--border-gold);
}

.web-step-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-gold-light);
  margin-bottom: 10px;
}

.web-step-desc {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   帮助中心专属内容区 (help.html)
   ========================================================================== */
.help-hero {
  text-align: center;
  padding: 40px 0 20px;
}

.faq-list {
  max-width: 900px;
  margin: 30px auto 48px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--color-lacquer-card);
  border: 1px solid var(--border-gold);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-deep);
  transition: var(--transition);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 18px 24px;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-gold-light);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  letter-spacing: 0.8px;
}

.faq-question::after {
  content: "▼";
  font-size: 0.85rem;
  color: var(--color-nacre-cyan);
  transition: var(--transition);
}

.faq-item.active .faq-question::after {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 20px;
  font-size: 0.98rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
  padding-top: 14px;
}

/* ==========================================================================
   页脚规范
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-gold);
  background: var(--color-lacquer-pure);
  padding: 36px 0;
  text-align: center;
  margin-top: 40px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
  list-style: none;
  margin-bottom: 16px;
}

.footer-nav a {
  font-size: 0.94rem;
  color: var(--color-text-muted);
  transition: var(--transition);
}

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

.footer-copy {
  font-size: 0.86rem;
  color: var(--color-text-dim);
}

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 992px) {
  .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .lacquer-box,
  .lacquer-box.reverse {
    flex-direction: column;
    padding: 32px 22px;
    gap: 30px;
  }
  .feature-media img {
    max-width: 100%;
  }
  .web-steps-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-inner {
    flex-direction: column;
    height: auto;
    padding: 16px 0;
    gap: 12px;
  }
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 10px;
  }
  .hero-title {
    font-size: 1.6rem;
  }
  .hero-subtitle {
    font-size: 1.1rem;
    flex-direction: column;
    gap: 6px;
  }
  .hero-subtitle::before,
  .hero-subtitle::after {
    display: none;
  }
  .download-grid {
    grid-template-columns: 1fr;
  }
  .web-entry-actions {
    flex-direction: column;
  }
  .chat-input-row {
    flex-direction: column;
  }
  .chat-input-row .btn-lacquer {
    width: 100%;
  }
}