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

:root {
  --bg: #f4f6f9;
  --bg-soft: #ffffff;
  --card: #ffffff;
  --card-hover: #ffffff;
  --line: #e6eaf0;
  --line-strong: #d5dbe4;
  --text: #1a1f2b;
  --text-mid: #5a6478;
  --text-dim: #8b94a6;
  --accent: #e63946;
  --accent-soft: #fdecee;
  --accent-2: #3b82f6;
  --accent-2-soft: #eef4ff;
  --accent-3: #10b981;
  --accent-3-soft: #ecfdf5;
  --accent-4: #8b5cf6;
  --accent-4-soft: #f5f0ff;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow-md: 0 4px 14px -4px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 20px 40px -16px rgba(16, 24, 40, 0.16);
  --radius: 16px;
  --radius-lg: 24px;
  --radius-sm: 10px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --nav-height: 92px;
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
  padding-top: var(--nav-height);
}

/* ===== 顶部悬浮导航 ===== */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;

  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;

  background: rgba(244, 246, 249, 0.8);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);

  border-bottom: 1px solid transparent;
  transition: padding 0.3s ease, background 0.3s ease,
              border-color 0.3s ease, box-shadow 0.3s ease;
}

.top-nav .nav-inner {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.top-nav.scrolled {
  padding: 14px 40px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--line);
  box-shadow: 0 6px 24px -12px rgba(16, 24, 40, 0.18);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.nav-brand .logo {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background-image: url('https://hg-chat.win/favicon.svg');
  background-size: cover;
  background-position: center;
  background-color: #f0f2f6;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-mid);
}

.nav-links a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  padding: 10px 20px;
  border-radius: 100px;
  background: var(--text);
  color: #fff !important;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
}

.nav-cta:hover {
  background: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px -6px rgba(230, 57, 70, 0.5);
}

/* ===== 语言切换按钮 ===== */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  border-radius: 100px;
  background: var(--bg-soft);
  border: 1px solid var(--line-strong);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.25s ease;
  flex-shrink: 0;
}

.lang-toggle i {
  font-size: 0.9rem;
  color: var(--text-mid);
  transition: color 0.25s ease;
}

.lang-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px -8px rgba(230, 57, 70, 0.4);
}

.lang-toggle:hover i {
  color: var(--accent);
}

/* ===== Hero ===== */
.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 60px;
  padding: 40px 0 90px;
  position: relative;
}

.hero-text {
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 8px;
  border-radius: 100px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin-bottom: 24px;
}

.hero-badge .badge-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.6rem;
  flex-shrink: 0;
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 4.4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin-bottom: 22px;
  color: var(--text);
}

.hero-title .accent {
  color: var(--accent);
  position: relative;
  white-space: nowrap;
}

.hero-title .accent::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 6px;
  width: 100%;
  height: 12px;
  background: var(--accent-soft);
  z-index: -1;
  border-radius: 4px;
}

.hero-desc {
  font-size: 1.08rem;
  color: var(--text-mid);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-desc strong {
  color: var(--text);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 100px;
  background: var(--accent);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 8px 22px -6px rgba(230, 57, 70, 0.45);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -8px rgba(230, 57, 70, 0.55);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 100px;
  background: var(--bg-soft);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--line-strong);
  cursor: pointer;
  transition: all 0.25s ease;
}

.btn-secondary:hover {
  border-color: var(--text);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* 右侧头像 */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.avatar-frame {
  width: 260px;
  height: 260px;
  border-radius: 32px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transform: rotate(-3deg);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.avatar-frame:hover {
  transform: rotate(0deg) scale(1.02);
}

.avatar-frame::before {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 24px;
  border: 1px dashed var(--line-strong);
}

.avatar-img {
  width: 190px;
  height: 190px;
  border-radius: 50%;
  background-image: url('https://hg-chat.win/favicon.svg');
  background-size: cover;
  background-position: center;
  background-color: #f0f2f6;
  border: 4px solid #fff;
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 1;
}

/* 头像旁的装饰小点 */
.deco-dot {
  position: absolute;
  border-radius: 50%;
}
.deco-dot.d1 {
  width: 14px; height: 14px;
  background: var(--accent);
  top: -6px; right: 30px;
}
.deco-dot.d2 {
  width: 10px; height: 10px;
  background: var(--accent-2);
  bottom: 20px; left: -8px;
}
.deco-dot.d3 {
  width: 8px; height: 8px;
  background: var(--accent-3);
  top: 40px; left: -12px;
}

/* ===== 区块标题 ===== */
.section {
  padding-bottom: 70px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.section-title .count {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-left: 10px;
  letter-spacing: 0;
}

.section-sub {
  font-size: 0.88rem;
  color: var(--text-dim);
}

/* ===== 工具卡片网格 ===== */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.tool-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.tool-card:hover {
  border-color: var(--card-accent, var(--accent));
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* 按钮版 tool-card 重置 */
button.tool-card {
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  width: 100%;
}

/* 键盘焦点可见（无障碍） */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

button.tool-card:focus-visible {
  outline-color: var(--card-accent, var(--accent));
}

.tool-icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--card-accent-soft, var(--accent-soft));
  color: var(--card-accent, var(--accent));
  font-size: 1.35rem;
  transition: all 0.3s ease;
}

.tool-card:hover .tool-icon {
  transform: scale(1.08);
}

.tool-icon img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.tool-body {
  flex: 1;
  min-width: 0;
}

.tool-name {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tool-tag {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tool-arrow {
  color: var(--text-dim);
  font-size: 0.8rem;
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.tool-card:hover .tool-arrow {
  color: var(--card-accent, var(--accent));
  transform: translateX(3px);
}

/* 卡片配色 */
.c-orange { --card-accent: #e63946; --card-accent-soft: #fdecee; }
.c-green  { --card-accent: #10b981; --card-accent-soft: #ecfdf5; }
.c-purple { --card-accent: #8b5cf6; --card-accent-soft: #f5f0ff; }
.c-blue   { --card-accent: #3b82f6; --card-accent-soft: #eef4ff; }
.c-pink   { --card-accent: #ec4899; --card-accent-soft: #fdf2f8; }
.c-gray   { --card-accent: #64748b; --card-accent-soft: #f1f5f9; }
.c-teal   { --card-accent: #14b8a6; --card-accent-soft: #f0fdfa; }
.c-red    { --card-accent: #ef4444; --card-accent-soft: #fef2f2; }

/* ===== 社交栏 ===== */
.social-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.social-card {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px 12px 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 100px;
  text-decoration: none;
  color: var(--text-mid);
  font-size: 0.88rem;
  font-weight: 600;
  transition: all 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: var(--shadow-sm);
}

.social-card i,
.social-card svg {
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  color: var(--social-color, var(--text-mid));
  transition: color 0.28s ease;
  flex-shrink: 0;
}

.social-card svg {
  fill: var(--social-color, var(--text-mid));
}

.social-card:hover {
  transform: translateY(-3px);
  border-color: var(--social-color, var(--accent));
  color: var(--text);
  box-shadow: var(--shadow-md);
}

.social-card.roblox-item:hover {
  background: #335FFF;
  border-color: #335FFF;
  color: #fff;
}
.social-card.roblox-item:hover svg {
  fill: #fff;
}

/* ===== 页脚 ===== */
.footer {
  padding: 32px 0 44px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 14px;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-left .status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-3);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.15);
}

/* ===== 分享弹窗 ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(16, 24, 40, 0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 10000;
}

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

.modal-box {
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  box-shadow: 0 40px 80px -20px rgba(16, 24, 40, 0.4);
  padding: 40px 36px 32px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  position: relative;
  transform: scale(0.94) translateY(12px);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text-mid);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
}

.modal-close:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(90deg);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 24px;
}

.modal-qr {
  width: 100%;
  max-width: 230px;
  aspect-ratio: 1 / 1;
  margin: 0 auto 24px;
  background: #ffffff;
  border-radius: var(--radius);
  padding: 12px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-qr img {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 8px;
}

.modal-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.modal-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  transition: all 0.28s ease;
}

.modal-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.modal-btn-png:hover {
  background: var(--accent-3-soft);
  border-color: var(--accent-3);
  color: var(--accent-3);
}

.modal-btn-svg:hover {
  background: var(--accent-4-soft);
  border-color: var(--accent-4);
  color: var(--accent-4);
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  left: 50%;
  bottom: 40px;
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 13px 26px;
  border-radius: 100px;
  box-shadow: 0 15px 35px -10px rgba(16, 24, 40, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 20000;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  :root {
    --nav-height: 84px;
  }
  .hero {
    grid-template-columns: 1fr;
    gap: 44px;
    padding: 30px 0 70px;
  }
  .hero-visual {
    justify-content: flex-start;
  }
  .avatar-frame {
    width: 220px;
    height: 220px;
  }
  .avatar-img {
    width: 160px;
    height: 160px;
  }
  .nav-links {
    display: none;
  }
  .lang-toggle {
    padding: 8px 12px;
    font-size: 0.78rem;
  }
}

@media (max-width: 640px) {
  :root {
    --nav-height: 80px;
  }
  .page { padding: 0 22px; padding-top: var(--nav-height); }
  .top-nav { padding: 16px 22px; }
  .top-nav.scrolled { padding: 12px 22px; }
  .nav-brand { font-size: 1rem; }
  .nav-brand .logo { width: 30px; height: 30px; }
  .hero { padding: 24px 0 50px; }
  .hero-title { font-size: 2.4rem; }
  .hero-desc { font-size: 1rem; }
  .hero-actions { flex-direction: column; align-items: stretch; gap: 12px; }
  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
    white-space: nowrap;
    padding: 14px 20px;
  }
  .tool-grid { grid-template-columns: 1fr; }
  .section { padding-bottom: 50px; }
  .section-title { font-size: 1.25rem; }
  .social-card {
    flex: 1 1 calc(50% - 5px);
    justify-content: center;
    min-width: 0;
    padding: 10px 14px;
    font-size: 0.82rem;
  }
  .footer { flex-direction: column; text-align: center; }
  .modal-box { padding: 32px 22px 26px; }
  .modal-qr { max-width: 190px; }
  .modal-actions { grid-template-columns: 1fr; gap: 10px; }
  .lang-toggle {
    padding: 8px 12px;
    font-size: 0.78rem;
  }
}