/* ============================================
   糖心vlog 原创样式表
   品牌配色：糖果粉红 + 暖橙 + 梦幻紫
   bdvwib.cn
   ============================================ */

/* --- 基础重置与变量 --- */
:root {
  --tx-pink: #E8456B;
  --tx-orange: #FF8C42;
  --tx-purple: #6C5CE7;
  --tx-dark: #1A1A2E;
  --tx-dark2: #16213E;
  --tx-card: #202040;
  --tx-text: #F0E6EF;
  --tx-muted: #A8A0B8;
  --tx-grad: linear-gradient(135deg, #E8456B, #FF8C42);
  --tx-grad2: linear-gradient(135deg, #6C5CE7, #E8456B);
  --tx-radius: 12px;
  --tx-shadow: 0 4px 24px rgba(232,69,107,0.15);
}

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

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

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  background: var(--tx-dark);
  color: var(--tx-text);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--tx-pink); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--tx-orange); }

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

.tx-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --- 头部导航 --- */
.tx-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(26,26,46,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(232,69,107,0.2);
  transition: background 0.3s;
}

.tx-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.tx-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tx-logo img {
  height: 42px;
  width: auto;
}

.tx-logo-text {
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--tx-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tx-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.tx-nav a {
  color: var(--tx-muted);
  font-size: 0.92rem;
  padding: 8px 14px;
  border-radius: 8px;
  transition: all 0.3s;
  white-space: nowrap;
}

.tx-nav a:hover,
.tx-nav a.current {
  color: var(--tx-text);
  background: rgba(232,69,107,0.15);
}

.tx-search-box {
  position: relative;
  margin-left: 12px;
}

.tx-search-box input {
  width: 200px;
  padding: 8px 36px 8px 14px;
  border: 1px solid rgba(168,160,184,0.3);
  border-radius: 20px;
  background: rgba(32,32,64,0.8);
  color: var(--tx-text);
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.3s, width 0.3s;
}

.tx-search-box input:focus {
  border-color: var(--tx-pink);
  width: 260px;
}

.tx-search-box button {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--tx-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 6px;
}

.tx-mobile-btn {
  display: none;
  background: none;
  border: none;
  color: var(--tx-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* --- Hero Banner --- */
.tx-hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 68px;
  overflow: hidden;
}

.tx-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.4);
}

.tx-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(26,26,46,0.3) 0%, rgba(26,26,46,0.85) 100%);
}

.tx-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 60px 20px;
  max-width: 800px;
}

.tx-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.tx-hero h1 .tx-brand {
  background: var(--tx-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tx-hero-desc {
  font-size: 1.15rem;
  color: var(--tx-muted);
  margin-bottom: 28px;
  line-height: 1.8;
}

.tx-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 32px;
}

.tx-hero-tags span {
  background: rgba(232,69,107,0.15);
  color: var(--tx-pink);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  border: 1px solid rgba(232,69,107,0.3);
}

.tx-btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 28px;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
}

.tx-btn-primary {
  background: var(--tx-grad);
  color: #fff;
  box-shadow: 0 4px 20px rgba(232,69,107,0.35);
}

.tx-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(232,69,107,0.5);
  color: #fff;
}

.tx-btn-outline {
  background: transparent;
  color: var(--tx-text);
  border: 2px solid rgba(240,230,239,0.3);
  margin-left: 12px;
}

.tx-btn-outline:hover {
  border-color: var(--tx-pink);
  color: var(--tx-pink);
}

/* --- 通用区块 --- */
.tx-section {
  padding: 72px 0;
}

.tx-section-alt {
  background: var(--tx-dark2);
}

.tx-section-title {
  text-align: center;
  margin-bottom: 48px;
}

.tx-section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.tx-section-title h2 .tx-hl {
  background: var(--tx-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tx-section-title p {
  color: var(--tx-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* --- 特色功能网格 --- */
.tx-feat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.tx-feat-card {
  background: var(--tx-card);
  border-radius: var(--tx-radius);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid rgba(108,92,231,0.15);
  transition: transform 0.3s, box-shadow 0.3s;
}

.tx-feat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--tx-shadow);
}

.tx-feat-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}

.tx-feat-icon-pink { background: rgba(232,69,107,0.15); color: var(--tx-pink); }
.tx-feat-icon-orange { background: rgba(255,140,66,0.15); color: var(--tx-orange); }
.tx-feat-icon-purple { background: rgba(108,92,231,0.15); color: var(--tx-purple); }
.tx-feat-icon-green { background: rgba(0,184,148,0.15); color: #00B894; }

.tx-feat-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  font-weight: 600;
}

.tx-feat-card p {
  color: var(--tx-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* --- 视频卡片网格 --- */
.tx-video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.tx-video-card {
  background: var(--tx-card);
  border-radius: var(--tx-radius);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid rgba(108,92,231,0.1);
}

.tx-video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--tx-shadow);
}

.tx-thumb {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
}

.tx-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}

.tx-video-card:hover .tx-thumb img {
  transform: scale(1.08);
}

.tx-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 52px;
  height: 52px;
  background: rgba(232,69,107,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s;
  z-index: 2;
}

.tx-play-btn::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 3px;
}

.tx-video-card:hover .tx-play-btn {
  transform: translate(-50%, -50%) scale(1);
}

.tx-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.78rem;
  z-index: 2;
}

.tx-card-body {
  padding: 14px 16px;
}

.tx-card-body h4 {
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tx-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--tx-muted);
  font-size: 0.78rem;
}

.tx-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.tx-card-tags span {
  background: rgba(232,69,107,0.1);
  color: var(--tx-pink);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.72rem;
}

/* --- 专家团队 --- */
.tx-expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.tx-expert-card {
  background: var(--tx-card);
  border-radius: var(--tx-radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid rgba(108,92,231,0.12);
  transition: transform 0.3s;
}

.tx-expert-card:hover {
  transform: translateY(-4px);
}

.tx-expert-photo {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  margin: 0 auto 14px;
  overflow: hidden;
  border: 3px solid var(--tx-pink);
}

.tx-expert-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tx-expert-card h4 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.tx-expert-role {
  color: var(--tx-pink);
  font-size: 0.82rem;
  margin-bottom: 10px;
}

.tx-expert-desc {
  color: var(--tx-muted);
  font-size: 0.82rem;
  line-height: 1.5;
  margin-bottom: 14px;
}

.tx-expert-btns {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.tx-btn-sm {
  padding: 6px 16px;
  font-size: 0.8rem;
  border-radius: 16px;
  border: 1px solid var(--tx-pink);
  color: var(--tx-pink);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s;
}

.tx-btn-sm:hover {
  background: var(--tx-pink);
  color: #fff;
}

.tx-btn-sm-fill {
  background: var(--tx-grad);
  color: #fff;
  border: none;
}

/* --- 品牌墙 --- */
.tx-brand-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}

.tx-brand-item {
  opacity: 0.6;
  transition: opacity 0.3s;
  filter: grayscale(0.5);
}

.tx-brand-item:hover {
  opacity: 1;
  filter: grayscale(0);
}

/* --- How-To 步骤 --- */
.tx-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step-counter;
}

.tx-step {
  background: var(--tx-card);
  border-radius: var(--tx-radius);
  padding: 28px 22px;
  position: relative;
  border: 1px solid rgba(108,92,231,0.12);
}

.tx-step-num {
  width: 40px;
  height: 40px;
  background: var(--tx-grad);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 14px;
  color: #fff;
}

.tx-step h4 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.tx-step p {
  color: var(--tx-muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* --- FAQ --- */
.tx-faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.tx-faq-item {
  background: var(--tx-card);
  border-radius: var(--tx-radius);
  margin-bottom: 12px;
  border: 1px solid rgba(108,92,231,0.1);
  overflow: hidden;
}

.tx-faq-q {
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.3s;
}

.tx-faq-q:hover {
  background: rgba(232,69,107,0.08);
}

.tx-faq-arrow {
  font-size: 1.2rem;
  transition: transform 0.3s;
  color: var(--tx-pink);
}

.tx-faq-item.open .tx-faq-arrow {
  transform: rotate(180deg);
}

.tx-faq-a {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: var(--tx-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.tx-faq-item.open .tx-faq-a {
  max-height: 300px;
  padding: 0 24px 18px;
}

/* --- 用户评价 --- */
.tx-review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.tx-review-card {
  background: var(--tx-card);
  border-radius: var(--tx-radius);
  padding: 24px;
  border: 1px solid rgba(108,92,231,0.1);
}

.tx-stars {
  color: var(--tx-orange);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.tx-review-text {
  color: var(--tx-muted);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 14px;
  font-style: italic;
}

.tx-reviewer {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tx-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--tx-grad);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: #fff;
}

.tx-reviewer-info {
  font-size: 0.82rem;
}

.tx-reviewer-info strong {
  display: block;
  color: var(--tx-text);
}

.tx-reviewer-info span {
  color: var(--tx-muted);
  font-size: 0.75rem;
}

/* --- 联系我们 --- */
.tx-contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.tx-contact-card {
  background: var(--tx-card);
  border-radius: var(--tx-radius);
  padding: 32px;
  border: 1px solid rgba(108,92,231,0.12);
}

.tx-contact-card h3 {
  font-size: 1.15rem;
  margin-bottom: 18px;
  color: var(--tx-pink);
}

.tx-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}

.tx-contact-icon {
  color: var(--tx-orange);
  font-size: 1.1rem;
  min-width: 24px;
  text-align: center;
  margin-top: 2px;
}

/* --- 分享栏 --- */
.tx-share-bar {
  display: flex;
  gap: 12px;
  justify-content: center;
  padding: 32px 0;
}

.tx-share-btn {
  padding: 10px 22px;
  border-radius: 24px;
  font-size: 0.85rem;
  border: 1px solid rgba(168,160,184,0.3);
  background: var(--tx-card);
  color: var(--tx-text);
  cursor: pointer;
  transition: all 0.3s;
}

.tx-share-btn:hover {
  border-color: var(--tx-pink);
  background: rgba(232,69,107,0.1);
}

/* --- 底部 --- */
.tx-footer {
  background: var(--tx-dark2);
  border-top: 1px solid rgba(108,92,231,0.15);
  padding: 48px 0 0;
}

.tx-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

.tx-footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.tx-footer-brand img {
  height: 36px;
}

.tx-footer-col h4 {
  font-size: 1rem;
  margin-bottom: 16px;
  color: var(--tx-text);
}

.tx-footer-col a {
  display: block;
  color: var(--tx-muted);
  font-size: 0.85rem;
  margin-bottom: 8px;
  transition: color 0.3s;
}

.tx-footer-col a:hover {
  color: var(--tx-pink);
}

.tx-footer-qr {
  display: flex;
  gap: 16px;
}

.tx-footer-qr img {
  width: 100px;
  border-radius: 8px;
}

.tx-footer-qr-label {
  font-size: 0.75rem;
  color: var(--tx-muted);
  text-align: center;
  margin-top: 6px;
}

.tx-footer-bottom {
  border-top: 1px solid rgba(108,92,231,0.1);
  padding: 20px 0;
  text-align: center;
  color: var(--tx-muted);
  font-size: 0.82rem;
}

.tx-update-time {
  margin-top: 6px;
  font-size: 0.78rem;
  color: var(--tx-muted);
}

/* --- 面包屑 --- */
.tx-breadcrumb {
  padding: 14px 0;
  font-size: 0.82rem;
  color: var(--tx-muted);
}

.tx-breadcrumb a {
  color: var(--tx-muted);
}

.tx-breadcrumb a:hover {
  color: var(--tx-pink);
}

/* --- 内页Hero --- */
.tx-page-hero {
  margin-top: 68px;
  padding: 56px 0;
  background: var(--tx-dark2);
  text-align: center;
}

.tx-page-hero h1 {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.tx-page-hero p {
  color: var(--tx-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* --- 内容区域 --- */
.tx-content {
  padding: 48px 0;
  line-height: 1.8;
}

.tx-content h2 {
  font-size: 1.5rem;
  margin: 32px 0 16px;
  color: var(--tx-text);
}

.tx-content h3 {
  font-size: 1.2rem;
  margin: 24px 0 12px;
  color: var(--tx-pink);
}

.tx-content p {
  margin-bottom: 16px;
  color: var(--tx-muted);
}

/* --- MCP Widget 占位 --- */
.tx-mcp-widget {
  background: var(--tx-card);
  border-radius: var(--tx-radius);
  padding: 24px;
  margin: 32px 0;
  border: 1px solid rgba(108,92,231,0.12);
  text-align: center;
  color: var(--tx-muted);
  font-size: 0.88rem;
}

/* --- 动画 --- */
.tx-fade {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.tx-fade.tx-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- 辅助 --- */
.tx-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
  .tx-feat-grid,
  .tx-video-grid,
  .tx-expert-grid,
  .tx-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .tx-footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .tx-nav {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(26,26,46,0.98);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid rgba(232,69,107,0.2);
  }
  .tx-nav.tx-open {
    display: flex;
  }
  .tx-mobile-btn {
    display: block;
  }
  .tx-search-box {
    display: none;
  }
  .tx-hero h1 {
    font-size: 1.8rem;
  }
  .tx-hero {
    min-height: 420px;
  }
  .tx-feat-grid,
  .tx-video-grid,
  .tx-expert-grid,
  .tx-steps {
    grid-template-columns: 1fr;
  }
  .tx-review-grid {
    grid-template-columns: 1fr;
  }
  .tx-contact-grid {
    grid-template-columns: 1fr;
  }
  .tx-footer-grid {
    grid-template-columns: 1fr;
  }
  .tx-section {
    padding: 48px 0;
  }
  .tx-section-title h2 {
    font-size: 1.5rem;
  }
  .tx-share-bar {
    flex-wrap: wrap;
  }
  .tx-btn-outline {
    margin-left: 0;
    margin-top: 10px;
  }
}

@media (max-width: 480px) {
  .tx-hero h1 {
    font-size: 1.5rem;
  }
  .tx-hero-desc {
    font-size: 0.95rem;
  }
  .tx-header-inner {
    height: 56px;
  }
  .tx-hero {
    margin-top: 56px;
    min-height: 360px;
  }
  .tx-page-hero {
    margin-top: 56px;
    padding: 36px 0;
  }
}

/* --- 懒加载 --- */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.4s;
}

img[loading="lazy"].tx-loaded {
  opacity: 1;
}