/* ==========================================================================
   看海实验室 · KANHAI LAB (khsci.com) - 视觉风格规范与交互样式表
   Design: Neo-Chinese Ink Elegance (新中式典雅水墨风 - 纯粹版)
   Version: 2026.08.24-3
   ========================================================================== */

:root {
  /* 宣纸与底色系统 */
  --paper-bg: #f4ecdf;
  --paper-main: #fffbf3;
  --paper-card: #ffffff;
  --paper-deep: #f8f1e5;
  --paper-tag: #f3eae0;

  /* 水墨与文字系统 */
  --ink-primary: #231c19;
  --ink-secondary: #584a44;
  --ink-muted: #82726a;

  /* 东方雅致主辅色 */
  --vermilion: #c84b31;
  --vermilion-hover: #b33e25;
  --vermilion-soft: rgba(200, 75, 49, 0.08);
  --vermilion-border: rgba(200, 75, 49, 0.25);

  --indigo: #1b456e;
  --indigo-soft: rgba(27, 69, 110, 0.08);

  --gold: #a68138;
  --gold-light: #c59f4e;
  --gold-soft: rgba(166, 129, 56, 0.12);

  --pine-green: #3a6859;

  /* 线框与微投影 */
  --border-line: rgba(164, 120, 85, 0.18);
  --border-card: rgba(164, 120, 85, 0.18);

  --shadow-sm: 0 3px 10px rgba(65, 40, 22, 0.04);
  --shadow-md: 0 8px 24px rgba(65, 40, 22, 0.07);
  --shadow-lg: 0 18px 44px rgba(65, 40, 22, 0.10);
  --shadow-hover: 0 16px 36px rgba(85, 45, 20, 0.11), 0 3px 10px rgba(200, 75, 49, 0.06);

  /* 字体系统 */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "STSong", "Songti SC", "SimSun", Georgia, serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* 动画曲线 */
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink-primary);
  background-color: var(--paper-bg);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(rgba(130, 95, 65, 0.05) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 251, 243, 0.4) 0%, rgba(244, 236, 223, 0.8) 100%);
  background-size: 16px 16px, 100% 100%;
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s var(--ease-smooth);
}

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

/* 主页面外壳 */
.page-shell {
  width: min(1340px, calc(100% - 32px));
  margin: 20px auto;
  background: var(--paper-main);
  border: 1px solid rgba(151, 107, 73, 0.24);
  border-radius: 28px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
  background-image: radial-gradient(rgba(100, 70, 50, 0.03) 0.8px, transparent 0.8px);
  background-size: 8px 8px;
}

/* ==========================================================================
   1. 顶部品牌栏 (Site Header)
   ========================================================================== */
.site-header {
  min-height: 80px;
  padding: 18px 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-line);
  background: rgba(255, 251, 243, 0.95);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 15px;
}

.brand-logo-wrap {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  padding: 2px;
  background: linear-gradient(135deg, var(--gold-light), rgba(166, 129, 56, 0.2));
  box-shadow: 0 2px 7px rgba(166, 129, 56, 0.16);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  background: #ffffff;
}

.brand strong {
  display: block;
  font: 600 22px/1.1 var(--font-serif);
  letter-spacing: 0.06em;
  color: var(--ink-primary);
}

.brand small {
  display: block;
  margin-top: 5px;
  font: 11px/1 var(--font-sans);
  letter-spacing: 0.22em;
  color: var(--ink-muted);
  font-weight: 500;
}

.header-tagline {
  font: 500 13px/1 var(--font-serif);
  color: var(--gold);
  letter-spacing: 0.12em;
}

/* ==========================================================================
   2. 主视觉区 (Hero Section)
   ========================================================================== */
.hero {
  min-height: 330px;
  position: relative;
  padding: 56px 72px 50px;
  overflow: hidden;
  border-bottom: 1px solid var(--border-line);
  background: linear-gradient(135deg, rgba(255, 251, 243, 0.98) 0%, rgba(248, 238, 224, 0.6) 100%);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    rgba(255, 251, 243, 0.98) 0%,
    rgba(255, 251, 243, 0.92) 38%,
    rgba(255, 251, 243, 0.65) 62%,
    rgba(255, 251, 243, 0.08) 85%
  );
  z-index: 1;
}

.hero-art {
  position: absolute;
  z-index: 0;
  width: 66%;
  height: 100%;
  right: -3%;
  top: 0;
  object-fit: cover;
  object-position: right center;
  mix-blend-mode: multiply;
  opacity: 0.94;
  filter: contrast(1.03);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.eyebrow-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 5px 14px 5px 10px;
  background: rgba(166, 129, 56, 0.10);
  border: 1px solid rgba(166, 129, 56, 0.25);
  border-radius: 20px;
  color: #8c631b;
  font: 600 12px/1 var(--font-sans);
  letter-spacing: 0.18em;
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--vermilion);
  box-shadow: 0 0 0 3px rgba(200, 75, 49, 0.2);
}

.hero h1 {
  margin: 0;
  max-width: 760px;
  font: 700 clamp(36px, 4.2vw, 54px)/1.2 var(--font-serif);
  letter-spacing: 0.02em;
  color: var(--ink-primary);
}

.hero h1 span {
  display: block;
}

.hero h1 .highlight-text {
  color: var(--vermilion);
  display: inline-block;
}

.hero-lead {
  margin: 20px 0 0;
  max-width: 600px;
  color: var(--ink-secondary);
  font: 400 16.5px/1.85 var(--font-serif);
}

/* 朱砂印章 */
.hero-seal {
  position: absolute;
  right: 56px;
  bottom: 34px;
  z-index: 2;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border: 2px solid var(--vermilion);
  border-radius: 8px;
  color: var(--vermilion);
  font: 700 13px/1.2 var(--font-serif);
  letter-spacing: 0.12em;
  background: rgba(255, 251, 243, 0.9);
  box-shadow: inset 0 0 0 1.5px rgba(200, 75, 49, 0.3), 0 3px 10px rgba(200, 75, 49, 0.12);
  transform: rotate(-4deg);
  pointer-events: none;
  user-select: none;
}

.hero-seal span {
  display: block;
}

/* ==========================================================================
   3. 精选项目网格区 (Projects Grid Section)
   ========================================================================== */
.projects-section {
  padding: 42px 44px 54px;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin: 0 auto 34px;
  text-align: center;
}

.section-heading-inner {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.section-heading h2 {
  margin: 0;
  font: 700 28px var(--font-serif);
  letter-spacing: 0.12em;
  color: var(--ink-primary);
}

.section-heading-sub {
  font: 600 11px/1 var(--font-sans);
  letter-spacing: 0.28em;
  color: var(--gold);
}

.heading-rule {
  width: 90px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  position: relative;
}

.heading-rule::after {
  content: "✦";
  font-size: 10px;
  color: var(--gold);
  position: absolute;
  top: -7px;
}

.heading-rule:first-child::after {
  right: 0;
}

.heading-rule:last-child::after {
  left: 0;
}

/* 3x2 网格容器 */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

/* 卡片主体 */
.project-card {
  background: var(--paper-card);
  border: 1px solid var(--border-card);
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s var(--ease-spring), border-color 0.35s;
  position: relative;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(200, 75, 49, 0.35);
}

/* 卡片顶部媒体图 - 饱满通栏，无左右空隙，比例真实 */
.project-media {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 11;
  overflow: hidden;
  background: #fcf8f0;
  position: relative;
  border-bottom: 1px solid rgba(164, 120, 85, 0.12);
}

.project-art-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  transition: transform 0.45s var(--ease-spring), filter 0.35s ease;
  display: block;
}

.project-card:hover .project-art-img {
  transform: scale(1.04);
  filter: saturate(1.06);
}

/* 卡片内容区 */
.project-body {
  padding: 18px 20px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-header-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 10px;
}

.project-logo {
  width: 46px;
  height: 46px;
  object-fit: contain;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid rgba(132, 97, 76, 0.20);
  padding: 4px;
  flex-shrink: 0;
  box-shadow: 0 2px 5px rgba(60, 40, 25, 0.05);
}

.project-title-group {
  min-width: 0;
  flex: 1;
}

.project-badge-meta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 3px;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 10px;
  font: 600 11px/1.2 var(--font-sans);
  letter-spacing: 0.04em;
  background: var(--vermilion-soft);
  color: var(--vermilion);
  border: 1px solid var(--vermilion-border);
}

.badge-tag.badge-gold {
  background: var(--gold-soft);
  color: #8a641b;
  border-color: rgba(166, 129, 56, 0.3);
}

.badge-tag.badge-indigo {
  background: var(--indigo-soft);
  color: var(--indigo);
  border-color: rgba(27, 69, 110, 0.25);
}

.badge-tag.badge-green {
  background: rgba(58, 104, 89, 0.1);
  color: var(--pine-green);
  border-color: rgba(58, 104, 89, 0.3);
}

.project-copy h3 {
  margin: 0;
  font: 700 20px/1.2 var(--font-serif);
  color: var(--ink-primary);
}

.project-desc {
  margin: 0 0 12px;
  color: var(--ink-secondary);
  font: 400 13.5px/1.65 var(--font-serif);
  flex: 1;
}

/* 产品特性 Tag 胶囊 */
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.feature-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 6px;
  background: var(--paper-tag);
  color: var(--ink-secondary);
  font: 500 11.5px/1.2 var(--font-sans);
  border: 1px solid rgba(164, 120, 85, 0.16);
  transition: background 0.2s, border-color 0.2s;
}

.project-card:hover .feature-tag {
  background: #ffffff;
  border-color: rgba(164, 120, 85, 0.28);
}

/* 卡片底栏链接 */
.project-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px dashed rgba(164, 120, 85, 0.20);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: 600 13px var(--font-sans);
  color: var(--indigo);
  transition: all 0.25s var(--ease-spring);
}

.project-link span {
  font-size: 15px;
  transition: transform 0.25s var(--ease-spring);
}

.project-card:hover .project-link {
  color: var(--vermilion);
}

.project-card:hover .project-link span {
  transform: translateX(4px);
}

.card-status-dot {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font: 500 11px var(--font-sans);
  color: var(--ink-muted);
}

.status-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--pine-green);
  box-shadow: 0 0 0 2px rgba(58, 104, 89, 0.2);
}

/* ==========================================================================
   4. 项目开发定制服务区 (Custom Dev Section - 全栈实力)
   ========================================================================== */
.custom-dev-section {
  margin: 0 44px 40px;
}

.custom-card {
  padding: 40px 44px 36px;
  background: linear-gradient(135deg, #fffdf8 0%, #f7eee1 100%);
  border: 1px solid rgba(166, 129, 56, 0.32);
  border-radius: 24px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.custom-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--gold), var(--vermilion), var(--indigo));
}

.custom-header {
  margin-bottom: 26px;
  max-width: 860px;
}

.custom-header h2 {
  margin: 0 0 12px;
  font: 700 clamp(24px, 2.5vw, 32px)/1.25 var(--font-serif);
  color: var(--ink-primary);
  letter-spacing: 0.02em;
}

.custom-lead {
  margin: 0;
  color: var(--ink-secondary);
  font: 400 15.5px/1.85 var(--font-serif);
}

.custom-strengths {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 26px;
}

.strength-pill {
  padding: 18px 20px;
  background: #ffffff;
  border: 1px solid var(--border-card);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s var(--ease-spring), border-color 0.3s;
}

.strength-pill:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(200, 75, 49, 0.3);
}

.strength-icon {
  font-size: 22px;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}

.strength-info {
  flex: 1;
  min-width: 0;
}

.strength-info strong {
  display: block;
  font: 700 16px/1.2 var(--font-serif);
  color: var(--ink-primary);
  margin-bottom: 5px;
}

.strength-info span {
  display: block;
  font: 400 12.5px/1.55 var(--font-sans);
  color: var(--ink-muted);
}

.custom-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 20px;
  border-top: 1px dashed rgba(164, 120, 85, 0.24);
  flex-wrap: wrap;
}

.custom-footer-text {
  font: 500 14px/1.65 var(--font-serif);
  color: var(--ink-secondary);
  flex: 1;
  min-width: 280px;
}

.custom-contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 24px;
  background: var(--vermilion);
  color: #ffffff;
  font: 600 14px/1 var(--font-sans);
  box-shadow: 0 4px 14px rgba(200, 75, 49, 0.28);
  transition: all 0.28s var(--ease-spring);
  white-space: nowrap;
}

.custom-contact-btn:hover {
  background: var(--vermilion-hover);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(200, 75, 49, 0.38);
}

.custom-contact-btn span:last-child {
  font-size: 15px;
  transition: transform 0.25s var(--ease-spring);
}

.custom-contact-btn:hover span:last-child {
  transform: translateX(3px) translateY(-2px);
}

/* ==========================================================================
   5. 关于我们与理念区 (About Section - 纯净版)
   ========================================================================== */
.about-section {
  margin: 0 44px 44px;
}

.about-card {
  padding: 36px 40px;
  background: linear-gradient(135deg, var(--paper-deep) 0%, rgba(255, 251, 243, 0.95) 100%);
  border: 1px solid var(--border-line);
  border-radius: 22px;
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--vermilion), var(--indigo));
}

.about-eyebrow {
  margin-bottom: 8px;
  color: var(--gold);
  font: 600 11.5px/1 var(--font-sans);
  letter-spacing: 0.22em;
}

.about-header h2 {
  margin: 0 0 14px;
  font: 700 28px/1.2 var(--font-serif);
  color: var(--ink-primary);
}

.about-text {
  margin: 0 0 18px;
  color: var(--ink-secondary);
  font: 400 15px/1.85 var(--font-serif);
  max-width: 860px;
}

.about-badges {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.about-badge-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 15px;
  background: #ffffff;
  border: 1px solid var(--border-line);
  border-radius: 12px;
  font: 500 12.5px/1 var(--font-sans);
  color: var(--ink-secondary);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s var(--ease-spring);
}

.about-badge-link:hover {
  color: var(--vermilion);
  border-color: var(--vermilion-border);
  background: #ffffff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.badge-arrow {
  font-size: 13px;
  color: var(--indigo);
  transition: transform 0.25s var(--ease-spring), color 0.25s;
}

.about-badge-link:hover .badge-arrow {
  transform: translateX(2px) translateY(-1px);
  color: var(--vermilion);
}

/* ==========================================================================
   5. 底部页脚 (Site Footer)
   ========================================================================== */
.site-footer {
  padding: 22px 44px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--ink-muted);
  border-top: 1px solid var(--border-line);
  font: 13px/1 var(--font-sans);
  background: var(--paper-deep);
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
}

.footer-left strong {
  color: var(--ink-primary);
  font-weight: 600;
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
}

/* ==========================================================================
   6. 响应式适配
   ========================================================================== */

/* 平板端 (<= 1024px) */
@media (max-width: 1024px) {
  .page-shell {
    width: min(100% - 20px, 940px);
    margin: 10px auto;
    border-radius: 20px;
  }

  .site-header {
    padding: 16px 28px;
  }

  .hero {
    padding: 44px 36px 40px;
  }

  .hero-art {
    width: 82%;
    right: -12%;
    opacity: 0.88;
  }

  .hero-seal {
    right: 28px;
    bottom: 24px;
    width: 52px;
    height: 52px;
    font-size: 11px;
  }

  .projects-section {
    padding: 32px 28px 44px;
  }

  .project-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .custom-dev-section {
    margin: 0 28px 36px;
  }

  .custom-card {
    padding: 28px 28px;
  }

  .custom-strengths {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .about-section {
    margin: 0 28px 36px;
  }

  .about-card {
    padding: 28px 28px;
  }
}

/* 手机端 (<= 680px) */
@media (max-width: 680px) {
  .page-shell {
    width: min(100% - 12px, 500px);
    margin: 6px auto;
    border-radius: 16px;
  }

  .site-header {
    min-height: 64px;
    padding: 12px 18px;
  }

  .header-tagline {
    display: none;
  }

  .brand-logo-wrap {
    width: 38px;
    height: 38px;
  }

  .brand strong {
    font-size: 17px;
  }

  .brand small {
    font-size: 9px;
    letter-spacing: 0.16em;
  }

  .hero {
    padding: 30px 18px 28px;
  }

  .hero-art {
    width: 120%;
    right: -40%;
    opacity: 0.6;
  }

  .hero h1 {
    font-size: clamp(28px, 8vw, 38px);
  }

  .hero-lead {
    font-size: 14.5px;
    margin-top: 12px;
  }

  .hero-seal {
    display: none;
  }

  .projects-section {
    padding: 24px 16px 32px;
  }

  .section-heading h2 {
    font-size: 22px;
  }

  .heading-rule {
    width: 38px;
  }

  .project-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .project-media {
    aspect-ratio: 16 / 10;
  }

  .custom-dev-section {
    margin: 0 16px 24px;
  }

  .custom-card {
    padding: 22px 18px;
  }

  .custom-header h2 {
    font-size: 22px;
  }

  .custom-lead {
    font-size: 14px;
  }

  .custom-strengths {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .strength-pill {
    padding: 14px 16px;
    gap: 12px;
  }

  .custom-footer {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }

  .custom-contact-btn {
    justify-content: center;
    width: 100%;
  }

  .about-section {
    margin: 0 16px 24px;
  }

  .about-card {
    padding: 20px 16px;
  }

  .about-header h2 {
    font-size: 22px;
  }

  .about-text {
    font-size: 13.5px;
  }

  .site-footer {
    padding: 16px;
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* ==========================================================================
   7. 微信联系弹窗 (WeChat Contact Modal)
   ========================================================================== */
.wechat-modal {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0.25s, opacity 0.25s ease;
}

.wechat-modal.is-active {
  visibility: visible;
  opacity: 1;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(26, 18, 14, 0.62);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.modal-box {
  position: relative;
  z-index: 2;
  width: min(440px, 100%);
  background: #fffdf8;
  border: 1px solid rgba(166, 129, 56, 0.38);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(45, 25, 15, 0.25);
  padding: 34px 30px 28px;
  text-align: center;
  transform: scale(0.94) translateY(10px);
  transition: transform 0.3s var(--ease-spring);
}

.wechat-modal.is-active .modal-box {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 18px;
  width: 32px;
  height: 32px;
  border: 1px solid var(--border-line);
  border-radius: 50%;
  background: #ffffff;
  color: var(--ink-muted);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.modal-close:hover {
  background: var(--paper-deep);
  color: var(--ink-primary);
  border-color: var(--vermilion-border);
}

.modal-icon {
  font-size: 36px;
  margin-bottom: 8px;
  line-height: 1;
}

.modal-box h3 {
  margin: 0 0 6px;
  font: 700 22px/1.2 var(--font-serif);
  color: var(--ink-primary);
}

.modal-desc {
  margin: 0 0 20px;
  font: 400 13.5px/1.6 var(--font-sans);
  color: var(--ink-secondary);
}

.wechat-card {
  background: #fbf6ec;
  border: 1px solid rgba(166, 129, 56, 0.25);
  border-radius: 16px;
  padding: 16px 18px;
  text-align: left;
}

.wechat-id-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(164, 120, 85, 0.25);
}

.wechat-label {
  font: 500 12px var(--font-sans);
  color: var(--ink-muted);
}

.wechat-id {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink-primary);
  letter-spacing: 0.05em;
  user-select: all;
}

.copy-btn {
  padding: 6px 14px;
  border: 0;
  border-radius: 10px;
  background: var(--vermilion);
  color: #ffffff;
  font: 600 12.5px var(--font-sans);
  cursor: pointer;
  transition: all 0.25s var(--ease-spring);
  box-shadow: 0 3px 8px rgba(200, 75, 49, 0.25);
}

.copy-btn:hover {
  background: var(--vermilion-hover);
  transform: translateY(-1px);
  box-shadow: 0 5px 12px rgba(200, 75, 49, 0.35);
}

.copy-btn.copied {
  background: var(--pine-green);
  box-shadow: 0 3px 8px rgba(58, 104, 89, 0.25);
}

.wechat-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 12px;
  font: 500 13px/1.4 var(--font-sans);
  color: var(--ink-secondary);
}

.highlight-remark {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 6px;
  background: var(--vermilion-soft);
  color: var(--vermilion);
  font-weight: 700;
  border: 1px solid var(--vermilion-border);
  letter-spacing: 0.05em;
}

.modal-copy-tip {
  margin-top: 12px;
  font-size: 12px;
  color: var(--pine-green);
  font-weight: 600;
  opacity: 0;
  transform: translateY(4px);
  transition: all 0.25s ease;
}

.modal-copy-tip.show {
  opacity: 1;
  transform: translateY(0);
}