@charset "UTF-8";

/* ==========================================================================
   【青铜纹饰风】通义千问官方AI安全平台样式
   设计规范：
     主色青铜绿：#4A6B5D (古铜深沉、厚重威严)
     辅色铜锈青：#6B9080 (铜绿生华、岁月积淀)
     点缀金铭：#C9A227 (吉金铭文、辉映千载)
     背景玄黑：#1A1F1D (玄铁幽邃、沉静肃穆)
   核心意象：
     饕餮纹、夔龙纹回首底纹、青铜绿锈漫衍氧化、青铜鼎器造型容器、金文铸刻浮雕
   ========================================================================== */

:root {
  --color-bronze-green: #4A6B5D;
  --color-bronze-light: #5C8272;
  --color-bronze-dark: #324B40;
  --color-patina: #6B9080;
  --color-patina-light: #88B2A1;
  --color-patina-glow: rgba(107, 144, 128, 0.35);
  --color-gold-inscript: #C9A227;
  --color-gold-light: #E3BF4C;
  --color-gold-glow: rgba(201, 162, 39, 0.32);
  --color-xuan-black: #1A1F1D;
  --color-xuan-surface: #222926;
  --color-xuan-card: rgba(30, 38, 35, 0.94);
  --color-bronze-border: rgba(107, 144, 128, 0.35);
  --color-gold-border: rgba(201, 162, 39, 0.45);
  --color-text-main: #E2ECE7;
  --color-text-sub: #A8BBB2;
  --color-text-muted: #748B81;
  --font-serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", SimSun, STSong, serif;
  --shadow-bronze: 0 10px 32px rgba(10, 15, 13, 0.7);
  --shadow-gold: 0 0 18px rgba(201, 162, 39, 0.28);
  --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-xuan-black);
  color: var(--color-text-main);
  line-height: 1.85;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  /* 玄黑底质与青铜暗绿氧化光晕 */
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(74, 107, 93, 0.28) 0%, transparent 50%),
    radial-gradient(circle at 85% 25%, rgba(107, 144, 128, 0.22) 0%, transparent 45%),
    radial-gradient(circle at 50% 85%, rgba(201, 162, 39, 0.12) 0%, transparent 55%),
    linear-gradient(180deg, #161A18 0%, #1A1F1D 50%, #141716 100%);
  background-attachment: fixed;
}

/* 饕餮与云雷回纹青铜雕铸底纹 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: 
    repeating-linear-gradient(
      45deg,
      rgba(107, 144, 128, 0.03) 0px,
      rgba(107, 144, 128, 0.03) 1px,
      transparent 1px,
      transparent 28px
    ),
    repeating-linear-gradient(
      -45deg,
      rgba(201, 162, 39, 0.02) 0px,
      rgba(201, 162, 39, 0.02) 1px,
      transparent 1px,
      transparent 28px
    ),
    radial-gradient(circle at 50% 50%, transparent 0%, rgba(15, 20, 18, 0.6) 100%);
  pointer-events: none;
  z-index: 0;
}

/* 铜绿光泽缓慢氧化交融浮层动效 */
.bronze-patina-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.patina-drift {
  position: absolute;
  border-radius: 50%;
  filter: blur(50px);
  opacity: 0.18;
  animation: patinaOxidize 22s ease-in-out infinite alternate;
}

.patina-drift:nth-child(1) {
  top: -100px;
  left: 10%;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, var(--color-patina) 0%, var(--color-bronze-green) 60%, transparent 80%);
  animation-duration: 18s;
}

.patina-drift:nth-child(2) {
  top: 40%;
  right: 5%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, var(--color-gold-inscript) 0%, var(--color-bronze-dark) 65%, transparent 80%);
  animation-duration: 26s;
  animation-delay: -6s;
}

.patina-drift:nth-child(3) {
  bottom: -120px;
  left: 30%;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, var(--color-bronze-green) 0%, var(--color-patina-light) 60%, transparent 85%);
  animation-duration: 20s;
  animation-delay: -3s;
}

@keyframes patinaOxidize {
  0% {
    transform: scale(1) translate(0, 0) rotate(0deg);
    opacity: 0.14;
  }
  50% {
    transform: scale(1.18) translate(40px, -30px) rotate(8deg);
    opacity: 0.24;
  }
  100% {
    transform: scale(0.95) translate(-30px, 40px) rotate(-6deg);
    opacity: 0.16;
  }
}

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 — 鼎立青铜铸造横梁，锚点与下方功能模块一一对应
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(22, 27, 25, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 2px solid var(--color-bronze-green);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  transition: var(--transition);
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--color-gold-inscript) 50%, transparent 100%);
}

.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: 6px;
  border: 1px solid var(--color-gold-inscript);
  box-shadow: 0 0 12px var(--color-gold-glow);
  background: #111413;
  padding: 2px;
  object-fit: contain;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text-main);
  letter-spacing: 2px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-tag {
  font-size: 0.74rem;
  padding: 2px 8px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--color-bronze-dark), var(--color-bronze-green));
  color: var(--color-gold-inscript);
  border: 1px solid var(--color-gold-border);
  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: 0.98rem;
  font-weight: 600;
  color: var(--color-text-sub);
  border-radius: 4px;
  transition: var(--transition);
  position: relative;
  letter-spacing: 1px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-gold-inscript);
  background: rgba(107, 144, 128, 0.15);
  transform: translateY(-1px);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 15%;
  width: 70%;
  height: 2px;
  background: var(--color-gold-inscript);
  box-shadow: 0 0 6px var(--color-gold-inscript);
}

/* ==========================================================================
   Hero 首屏 + 下载区 (零滚动即可转化，青铜鼎峙，四方并立)
   ========================================================================== */
.hero-section {
  padding: 38px 0 24px;
  text-align: center;
  position: relative;
}

.bronze-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 24px;
  background: rgba(34, 43, 39, 0.9);
  border: 1px solid var(--color-gold-border);
  border-radius: 4px;
  color: var(--color-gold-inscript);
  font-size: 0.94rem;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 2.5px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5), inset 0 0 10px rgba(201, 162, 39, 0.15);
}

.bronze-rivet {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gold-inscript);
  box-shadow: 0 0 8px var(--color-gold-inscript);
}

.hero-title {
  font-size: 2.05rem;
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.35;
  margin-bottom: 14px;
  letter-spacing: 2px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8), 0 0 20px rgba(107, 144, 128, 0.25);
}

.hero-subtitle {
  font-size: 1.32rem;
  color: var(--color-patina-light);
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.hero-subtitle::before,
.hero-subtitle::after {
  content: "— ✦ 钟鼎铭言 · 磐石安全 ✦ —";
  font-size: 0.86rem;
  color: var(--color-gold-inscript);
  font-weight: 600;
  letter-spacing: 1px;
}

.hero-desc {
  max-width: 880px;
  margin: 0 auto 30px;
  font-size: 1.05rem;
  color: var(--color-text-sub);
  line-height: 1.85;
}

/* 并列 4 个下载入口卡片（青铜鼎足铸造卡片，零滚动转化） */
.download-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 10px;
}

.download-card {
  background: var(--color-xuan-card);
  border: 1px solid var(--color-bronze-border);
  border-radius: 8px;
  padding: 24px 18px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-bronze);
}

/* 鼎耳与铜钉乳钉边角修饰 */
.download-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-bronze-green), var(--color-gold-inscript), var(--color-bronze-green));
}

.download-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-gold-inscript);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.8), 0 0 20px rgba(107, 144, 128, 0.25);
  background: #252D29;
}

.download-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
  display: inline-block;
  filter: drop-shadow(0 2px 8px rgba(201, 162, 39, 0.3));
}

.download-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 6px;
  letter-spacing: 1.2px;
}

.download-text {
  font-size: 0.86rem;
  color: var(--color-text-muted);
  margin-bottom: 18px;
  line-height: 1.5;
}

/* 金铭铸刻按钮 */
.btn-bronze {
  display: inline-block;
  width: 100%;
  padding: 10px 16px;
  border-radius: 4px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: #121815;
  background: linear-gradient(135deg, var(--color-gold-light) 0%, var(--color-gold-inscript) 100%);
  border: 1px solid var(--color-gold-light);
  box-shadow: var(--shadow-gold);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-bronze::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-bronze:hover {
  background: linear-gradient(135deg, #FFE27D 0%, var(--color-gold-inscript) 100%);
  transform: translateY(-2px);
  box-shadow: 0 0 24px rgba(201, 162, 39, 0.5);
}

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

.btn-bronze-secondary {
  background: rgba(34, 43, 39, 0.9);
  color: var(--color-text-main);
  border: 1px solid var(--color-bronze-border);
  box-shadow: none;
}

.btn-bronze-secondary:hover {
  background: rgba(74, 107, 93, 0.35);
  color: var(--color-gold-inscript);
  border-color: var(--color-gold-inscript);
}

/* ==========================================================================
   饕餮纹雷纹分割线
   ========================================================================== */
.bronze-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 44px auto;
  position: relative;
}

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

.bronze-divider-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 20px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-gold-inscript);
  background: #1B211E;
  border: 1px solid var(--color-gold-border);
  border-radius: 4px;
  letter-spacing: 2px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   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
   鼎器造型内容容器 (.ding-vessel)
   ========================================================================== */
.feature-section {
  padding: 22px 0;
}

.ding-vessel {
  display: flex;
  align-items: center;
  gap: 48px;
  background: var(--color-xuan-card);
  border: 1px solid var(--color-bronze-border);
  border-radius: 12px;
  padding: 44px;
  box-shadow: var(--shadow-bronze);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

/* 鼎足与回首夔龙纹暗纹角标 */
.ding-vessel::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle at top right, rgba(107, 144, 128, 0.16) 0%, transparent 70%);
  pointer-events: none;
}

.ding-vessel::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-bronze-green), transparent);
}

.ding-vessel:hover {
  border-color: var(--color-gold-inscript);
  transform: translateY(-4px);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.9), 0 0 24px rgba(107, 144, 128, 0.2);
}

.ding-vessel.reverse {
  flex-direction: row-reverse;
}

.feature-content {
  flex: 1;
}

.module-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(74, 107, 93, 0.25);
  color: var(--color-gold-inscript);
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: 2px;
  border-left: 3px solid var(--color-gold-inscript);
  margin-bottom: 12px;
  letter-spacing: 1.5px;
}

.feature-title {
  font-size: 1.82rem;
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.35;
  margin-bottom: 8px;
  letter-spacing: 1.5px;
}

.feature-subtitle {
  font-size: 1.05rem;
  color: var(--color-patina-light);
  font-weight: 700;
  margin-bottom: 22px;
  letter-spacing: 1.8px;
}

.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-sub);
  line-height: 1.75;
}

.scenario-bullet {
  color: var(--color-gold-inscript);
  font-size: 1.15rem;
  line-height: 1.6;
}

.scenario-item strong {
  color: var(--color-text-main);
  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: 8px;
  border: 1px solid var(--color-bronze-border);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.7);
  transition: var(--transition);
  background-color: #121614;
  object-fit: cover;
}

.ding-vessel:hover .feature-media img {
  transform: scale(1.02);
  border-color: var(--color-gold-inscript);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.9), 0 0 20px rgba(201, 162, 39, 0.25);
}

/* ==========================================================================
   网页版入口 — 零安装兜底，承接不愿下载的用户
   ========================================================================== */
.web-entry-section {
  padding: 30px 0 44px;
}

.web-entry-banner {
  background: linear-gradient(135deg, rgba(34, 43, 39, 0.96) 0%, rgba(26, 33, 30, 0.96) 100%);
  border: 1px solid var(--color-gold-border);
  border-radius: 12px;
  padding: 44px 34px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-bronze);
}

.web-entry-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-bronze-green), var(--color-gold-inscript), var(--color-bronze-green));
}

.web-entry-title {
  font-size: 1.86rem;
  font-weight: 700;
  color: var(--color-text-main);
  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-sub);
  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-xuan-card);
  border: 1px solid var(--color-bronze-border);
  border-radius: 8px;
  padding: 24px;
  box-shadow: var(--shadow-bronze);
}

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

.chat-input {
  flex: 1;
  padding: 14px 20px;
  border-radius: 4px;
  border: 1px solid var(--color-bronze-border);
  background: #141917;
  color: var(--color-text-main);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

.chat-input:focus {
  outline: none;
  border-color: var(--color-gold-inscript);
  box-shadow: 0 0 12px var(--color-gold-glow);
}

.chat-input-row .btn-bronze {
  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-xuan-card);
  border: 1px solid var(--color-bronze-border);
  border-radius: 8px;
  padding: 28px 22px;
  text-align: center;
  box-shadow: var(--shadow-bronze);
  position: relative;
}

.web-step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 4px;
  background: rgba(74, 107, 93, 0.3);
  color: var(--color-gold-inscript);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 14px;
  border: 1px solid var(--color-gold-border);
}

.web-step-title {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 10px;
}

.web-step-desc {
  font-size: 0.92rem;
  color: var(--color-text-sub);
  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-xuan-card);
  border: 1px solid var(--color-bronze-border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-bronze);
  transition: var(--transition);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 18px 24px;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--color-text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  letter-spacing: 0.8px;
}

.faq-question::after {
  content: "▼";
  font-size: 0.82rem;
  color: var(--color-gold-inscript);
  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-sub);
  line-height: 1.8;
  border-top: 1px solid rgba(107, 144, 128, 0.2);
  padding-top: 14px;
}

/* ==========================================================================
   页脚规范
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--color-bronze-border);
  background: #141816;
  padding: 36px 0;
  text-align: center;
  margin-top: 40px;
  position: relative;
}

.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-sub);
  transition: var(--transition);
}

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

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

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 992px) {
  .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ding-vessel,
  .ding-vessel.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: 1.55rem;
  }
  .hero-subtitle {
    font-size: 1.08rem;
    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-bronze {
    width: 100%;
  }
}