/* ===== 蘑菇视频网 - 共享样式 ===== */
/* 配色：蘑菇绿 #4a7c59 / 米白 #f5f1e8 / 暖橙 #e89a3c / 深棕 #3d3528 */

:root {
  --green: #4a7c59;
  --green-dark: #3a6247;
  --green-light: #6fa07e;
  --green-soft: #e8f0ea;
  --cream: #f5f1e8;
  --cream-dark: #ece5d4;
  --orange: #e89a3c;
  --orange-dark: #d4842a;
  --orange-soft: #fbe7cf;
  --brown: #3d3528;
  --brown-light: #6b6051;
  --white: #ffffff;
  --shadow: 0 6px 20px rgba(61, 53, 40, 0.08);
  --shadow-lg: 0 12px 32px rgba(61, 53, 40, 0.14);
  --radius: 22px;
  --radius-sm: 14px;
  --radius-lg: 32px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--cream);
  color: var(--brown);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===== 顶部导航栏 ===== */
.navbar { position: sticky; top: 0; z-index: 100; background: rgba(245, 241, 232, 0.92); backdrop-filter: saturate(180%) blur(12px); -webkit-backdrop-filter: saturate(180%) blur(12px); border-bottom: 1px solid rgba(74, 124, 89, 0.12); }
.nav-inner { max-width: 1240px; margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 22px; color: var(--green); flex-shrink: 0; }
.brand-logo { width: 38px; height: 38px; flex-shrink: 0; }
.nav-links { display: flex; gap: 6px; flex: 1; flex-wrap: wrap; }
.nav-links a { padding: 8px 14px; border-radius: 999px; font-size: 15px; font-weight: 600; color: var(--brown); transition: all 0.2s ease; white-space: nowrap; }
.nav-links a:hover { background: var(--green-soft); color: var(--green-dark); }
.nav-links a.active { background: var(--green); color: #fff; }
.nav-search { display: flex; align-items: center; gap: 8px; background: var(--white); border-radius: 999px; padding: 8px 16px; border: 1px solid rgba(74, 124, 89, 0.15); width: 200px; }
.nav-search input { border: none; outline: none; background: transparent; font-size: 14px; width: 100%; color: var(--brown); }
.nav-search svg { width: 16px; height: 16px; color: var(--brown-light); flex-shrink: 0; }
.nav-cta { background: var(--orange); color: #fff; padding: 9px 18px; border-radius: 999px; font-weight: 700; font-size: 14px; border: none; cursor: pointer; transition: all 0.2s ease; white-space: nowrap; }
.nav-cta:hover { background: var(--orange-dark); transform: translateY(-1px); }

/* ===== 通用布局 ===== */
.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.section { padding: 48px 0; }
.section-title { display: flex; align-items: center; gap: 10px; font-size: 24px; font-weight: 800; color: var(--brown); margin-bottom: 24px; }
.section-title .mushroom-dot { width: 28px; height: 28px; flex-shrink: 0; }
.section-title .more { margin-left: auto; font-size: 14px; font-weight: 600; color: var(--green); }

/* ===== Hero ===== */
.hero { position: relative; background: linear-gradient(135deg, var(--green-soft) 0%, var(--cream) 60%); border-radius: 0 0 var(--radius-lg) var(--radius-lg); padding: 56px 0 64px; overflow: hidden; }
.hero-inner { max-width: 1240px; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center; }
.hero-text h1 { font-size: 44px; line-height: 1.2; font-weight: 900; color: var(--brown); margin-bottom: 18px; }
.hero-text h1 .accent { color: var(--green); }
.hero-text p { font-size: 17px; color: var(--brown-light); margin-bottom: 28px; max-width: 480px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 26px; border-radius: 999px; font-weight: 700; font-size: 15px; cursor: pointer; border: none; transition: all 0.2s ease; }
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-dark); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-orange { background: var(--orange); color: #fff; }
.btn-orange:hover { background: var(--orange-dark); transform: translateY(-2px); }
.btn-ghost { background: var(--white); color: var(--brown); border: 2px solid var(--green); }
.btn-ghost:hover { background: var(--green-soft); }
.hero-stats { display: flex; gap: 28px; margin-top: 36px; }
.hero-stats .stat-num { font-size: 26px; font-weight: 900; color: var(--green); }
.hero-stats .stat-label { font-size: 13px; color: var(--brown-light); }
.hero-visual { position: relative; height: 360px; display: flex; align-items: center; justify-content: center; }
.hero-mushroom { width: 280px; height: 280px; filter: drop-shadow(0 16px 32px rgba(74, 124, 89, 0.25)); animation: float 4s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
.hero-bubble { position: absolute; background: var(--white); border-radius: var(--radius); padding: 12px 16px; box-shadow: var(--shadow); font-size: 13px; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.hero-bubble.b1 { top: 20px; left: 0; animation: float 5s ease-in-out infinite; }
.hero-bubble.b2 { bottom: 30px; right: 10px; animation: float 4.5s ease-in-out infinite 0.5s; }
.hero-bubble.b3 { top: 50%; right: 0; animation: float 5.5s ease-in-out infinite 1s; }
.hero-bubble .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--orange); }

/* ===== 分类胶囊 ===== */
.category-nav { display: flex; gap: 10px; overflow-x: auto; padding: 8px 0 16px; scrollbar-width: none; }
.category-nav::-webkit-scrollbar { display: none; }
.category-nav a { flex-shrink: 0; padding: 9px 20px; border-radius: 999px; background: var(--white); color: var(--brown); font-size: 14px; font-weight: 600; border: 1px solid rgba(74, 124, 89, 0.12); transition: all 0.2s ease; }
.category-nav a:hover { border-color: var(--green); color: var(--green); }
.category-nav a.active { background: var(--green); color: #fff; border-color: var(--green); }

/* ===== 瀑布流短视频卡片 ===== */
.video-grid { columns: 4; column-gap: 18px; }
.video-card { break-inside: avoid; margin-bottom: 18px; background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: all 0.25s ease; cursor: pointer; }
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.video-thumb { position: relative; width: 100%; aspect-ratio: 9 / 16; background: var(--green-soft); overflow: hidden; }
.video-thumb .thumb-bg { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 48px; }
.video-duration { position: absolute; bottom: 10px; right: 10px; background: rgba(0, 0, 0, 0.55); color: #fff; font-size: 12px; padding: 3px 8px; border-radius: 8px; font-weight: 600; }
.video-play { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 54px; height: 54px; border-radius: 50%; background: rgba(255, 255, 255, 0.9); display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity 0.2s ease; }
.video-card:hover .video-play { opacity: 1; }
.video-play svg { width: 24px; height: 24px; color: var(--green); margin-left: 3px; }
.video-tag { position: absolute; top: 10px; left: 10px; background: var(--orange); color: #fff; font-size: 11px; font-weight: 700; padding: 4px 10px; border-radius: 999px; }
.video-info { padding: 12px 14px 14px; }
.video-title { font-size: 14px; font-weight: 600; color: var(--brown); line-height: 1.4; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.video-meta { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: var(--brown-light); }
.video-author { display: flex; align-items: center; gap: 6px; min-width: 0; }
.avatar { width: 22px; height: 22px; border-radius: 50%; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; color: #fff; }
.video-author span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.video-stats { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }
.video-stats svg { width: 13px; height: 13px; }

/* ===== 热门话题 ===== */
.topics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.topic-card { background: var(--white); border-radius: var(--radius-sm); padding: 18px; box-shadow: var(--shadow); transition: all 0.2s ease; border: 2px solid transparent; }
.topic-card:hover { border-color: var(--green-light); transform: translateY(-3px); }
.topic-tag { font-size: 13px; font-weight: 700; color: var(--orange); margin-bottom: 6px; }
.topic-title { font-size: 16px; font-weight: 700; color: var(--brown); margin-bottom: 8px; }
.topic-hot { font-size: 12px; color: var(--brown-light); }

/* ===== 创作者推荐 ===== */
.creators-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.creator-card { background: var(--white); border-radius: var(--radius); padding: 22px 16px; text-align: center; box-shadow: var(--shadow); transition: all 0.2s ease; }
.creator-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.creator-avatar { width: 72px; height: 72px; border-radius: 50%; margin: 0 auto 12px; display: flex; align-items: center; justify-content: center; font-size: 28px; font-weight: 800; color: #fff; position: relative; }
.creator-avatar .vip { position: absolute; bottom: -2px; right: -2px; width: 22px; height: 22px; background: var(--orange); border-radius: 50%; border: 2px solid var(--white); display: flex; align-items: center; justify-content: center; font-size: 11px; }
.creator-name { font-size: 15px; font-weight: 700; color: var(--brown); margin-bottom: 4px; }
.creator-desc { font-size: 12px; color: var(--brown-light); margin-bottom: 12px; height: 32px; overflow: hidden; }
.creator-follow { display: inline-block; padding: 6px 18px; border-radius: 999px; background: var(--green-soft); color: var(--green-dark); font-size: 13px; font-weight: 700; border: none; cursor: pointer; transition: all 0.2s ease; }
.creator-follow:hover { background: var(--green); color: #fff; }
.creator-stats { display: flex; justify-content: center; gap: 14px; margin-top: 10px; font-size: 11px; color: var(--brown-light); }
.creator-stats b { color: var(--brown); font-weight: 700; }

/* ===== 直播卡片 ===== */
.live-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.live-card { background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: all 0.25s ease; }
.live-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.live-cover { position: relative; aspect-ratio: 16 / 10; background: var(--green-soft); display: flex; align-items: center; justify-content: center; font-size: 56px; overflow: hidden; }
.live-badge { position: absolute; top: 12px; left: 12px; background: #e74c3c; color: #fff; font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 8px; display: flex; align-items: center; gap: 5px; }
.live-badge .pulse { width: 6px; height: 6px; background: #fff; border-radius: 50%; animation: pulse 1.2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.live-viewers { position: absolute; top: 12px; right: 12px; background: rgba(0, 0, 0, 0.55); color: #fff; font-size: 12px; padding: 4px 10px; border-radius: 8px; display: flex; align-items: center; gap: 5px; font-weight: 600; }
.live-viewers svg { width: 12px; height: 12px; }
.live-info { padding: 14px; }
.live-title { font-size: 15px; font-weight: 700; color: var(--brown); margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.live-streamer { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--brown-light); }
.live-streamer .avatar { width: 26px; height: 26px; font-size: 12px; }
.live-cat { margin-left: auto; font-size: 11px; background: var(--orange-soft); color: var(--orange-dark); padding: 3px 10px; border-radius: 999px; font-weight: 600; }

/* ===== 页面横幅 ===== */
.page-banner { background: linear-gradient(135deg, var(--green) 0%, var(--green-light) 100%); border-radius: 0 0 var(--radius-lg) var(--radius-lg); padding: 56px 0 60px; color: #fff; position: relative; overflow: hidden; }
.page-banner::before { content: ""; position: absolute; top: -40px; right: -40px; width: 220px; height: 220px; background: rgba(255, 255, 255, 0.08); border-radius: 50%; }
.page-banner::after { content: ""; position: absolute; bottom: -60px; left: 10%; width: 160px; height: 160px; background: rgba(232, 154, 60, 0.18); border-radius: 50%; }
.page-banner .container { position: relative; z-index: 1; }
.page-banner h1 { font-size: 38px; font-weight: 900; margin-bottom: 12px; }
.page-banner p { font-size: 16px; opacity: 0.92; max-width: 560px; }
.breadcrumb { display: flex; gap: 8px; font-size: 13px; margin-bottom: 16px; opacity: 0.85; }
.breadcrumb a:hover { text-decoration: underline; }

/* ===== 卡片块 ===== */
.card { background: var(--white); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.card h3 { font-size: 20px; font-weight: 800; color: var(--brown); margin-bottom: 14px; }

/* ===== 创作者权益 ===== */
.benefit-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.benefit-card { background: var(--white); border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow); border-top: 4px solid var(--green); transition: all 0.2s ease; }
.benefit-card:hover { transform: translateY(-4px); }
.benefit-card.orange { border-top-color: var(--orange); }
.benefit-icon { width: 56px; height: 56px; border-radius: 16px; background: var(--green-soft); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.benefit-icon.orange { background: var(--orange-soft); }
.benefit-icon svg { width: 30px; height: 30px; color: var(--green); }
.benefit-icon.orange svg { color: var(--orange-dark); }
.benefit-card h3 { font-size: 18px; font-weight: 800; color: var(--brown); margin-bottom: 10px; }
.benefit-card p { font-size: 14px; color: var(--brown-light); line-height: 1.6; }

/* 收益阶梯 */
.income-ladder { background: var(--white); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.ladder-row { display: grid; grid-template-columns: 80px 1fr 120px 140px; gap: 16px; align-items: center; padding: 16px 0; border-bottom: 1px dashed rgba(74, 124, 89, 0.18); }
.ladder-row:last-child { border-bottom: none; }
.ladder-level { background: var(--green); color: #fff; text-align: center; padding: 8px 0; border-radius: 12px; font-weight: 700; font-size: 14px; }
.ladder-row.silver .ladder-level { background: #9aa3a8; }
.ladder-row.gold .ladder-level { background: var(--orange); }
.ladder-row.diamond .ladder-level { background: #6a5acd; }
.ladder-name { font-weight: 700; color: var(--brown); }
.ladder-desc { font-size: 13px; color: var(--brown-light); }
.ladder-income { text-align: right; font-weight: 800; color: var(--orange-dark); }
.ladder-bar { height: 8px; background: var(--green-soft); border-radius: 999px; overflow: hidden; }
.ladder-bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--green), var(--orange)); border-radius: 999px; }

/* ===== 频道卡片 ===== */
.channel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.channel-card { background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: all 0.25s ease; }
.channel-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.channel-banner { height: 100px; display: flex; align-items: center; justify-content: center; font-size: 44px; color: #fff; font-weight: 800; position: relative; }
.channel-body { padding: 18px; }
.channel-body h3 { font-size: 18px; font-weight: 800; color: var(--brown); margin-bottom: 6px; }
.channel-body p { font-size: 13px; color: var(--brown-light); margin-bottom: 12px; }
.channel-meta { display: flex; justify-content: space-between; font-size: 12px; color: var(--brown-light); }
.channel-meta b { color: var(--green); font-weight: 700; }

/* ===== 关于/故事 ===== */
.story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.story-visual { background: var(--green-soft); border-radius: var(--radius-lg); height: 320px; display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; }
.story-visual svg { width: 220px; height: 220px; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.value-card { text-align: center; padding: 28px 20px; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); }
.value-card .emoji { font-size: 40px; margin-bottom: 12px; }
.value-card h3 { font-size: 17px; margin-bottom: 8px; color: var(--brown); }
.value-card p { font-size: 13px; color: var(--brown-light); }

/* 时间线 */
.timeline { position: relative; padding-left: 32px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 3px; background: var(--green-soft); border-radius: 999px; }
.timeline-item { position: relative; padding-bottom: 26px; }
.timeline-item::before { content: ""; position: absolute; left: -28px; top: 4px; width: 16px; height: 16px; background: var(--green); border: 3px solid var(--white); border-radius: 50%; box-shadow: 0 0 0 3px var(--green-soft); }
.timeline-item .year { font-size: 14px; font-weight: 800; color: var(--orange-dark); margin-bottom: 4px; }
.timeline-item h4 { font-size: 16px; color: var(--brown); margin-bottom: 4px; }
.timeline-item p { font-size: 14px; color: var(--brown-light); }

/* ===== 联系/表单 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; }
.contact-info-card { background: var(--green); color: #fff; border-radius: var(--radius); padding: 32px; }
.contact-info-card h3 { font-size: 20px; margin-bottom: 18px; }
.contact-item { display: flex; gap: 14px; margin-bottom: 18px; align-items: flex-start; }
.contact-item .ico { width: 40px; height: 40px; border-radius: 12px; background: rgba(255, 255, 255, 0.15); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-item .ico svg { width: 20px; height: 20px; color: #fff; }
.contact-item .label { font-size: 12px; opacity: 0.8; }
.contact-item .value { font-size: 15px; font-weight: 600; }
.contact-form { background: var(--white); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; color: var(--brown); margin-bottom: 8px; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 12px 16px; border: 1.5px solid rgba(74, 124, 89, 0.2); border-radius: var(--radius-sm); font-size: 14px; font-family: inherit; background: var(--cream); color: var(--brown); outline: none; transition: border-color 0.2s ease; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--green); background: #fff; }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ===== 帮助中心 ===== */
.help-layout { display: grid; grid-template-columns: 240px 1fr; gap: 32px; align-items: start; }
.help-sidebar { background: var(--white); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); position: sticky; top: 90px; }
.help-sidebar a { display: block; padding: 11px 16px; border-radius: 12px; font-size: 14px; font-weight: 600; color: var(--brown); margin-bottom: 4px; transition: all 0.2s ease; }
.help-sidebar a:hover { background: var(--green-soft); color: var(--green-dark); }
.help-sidebar a.active { background: var(--green); color: #fff; }
.faq-item { background: var(--white); border-radius: var(--radius); padding: 22px 24px; margin-bottom: 14px; box-shadow: var(--shadow); border: 1px solid transparent; transition: border-color 0.2s ease; }
.faq-item summary { font-size: 16px; font-weight: 700; color: var(--brown); cursor: pointer; list-style: none; display: flex; align-items: center; gap: 10px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before { content: "+"; font-size: 22px; color: var(--green); font-weight: 800; margin-left: auto; transition: transform 0.2s ease; }
.faq-item[open] summary::before { content: "−"; }
.faq-item p { margin-top: 12px; font-size: 14px; color: var(--brown-light); line-height: 1.7; }

/* 步骤卡片 */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step-card { background: var(--white); border-radius: var(--radius); padding: 24px 20px; text-align: center; box-shadow: var(--shadow); position: relative; }
.step-num { width: 36px; height: 36px; border-radius: 50%; background: var(--green); color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center; margin: 0 auto 14px; font-size: 16px; }
.step-card h4 { font-size: 15px; color: var(--brown); margin-bottom: 6px; }
.step-card p { font-size: 13px; color: var(--brown-light); }

/* ===== 页脚 ===== */
.footer { background: var(--brown); color: #d8cfbf; padding: 56px 0 24px; margin-top: 60px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 36px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; color: #fff; font-size: 20px; font-weight: 800; }
.footer-brand svg { width: 34px; height: 34px; }
.footer p { font-size: 13px; line-height: 1.7; opacity: 0.85; max-width: 280px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 14px; font-weight: 700; }
.footer ul li { margin-bottom: 8px; }
.footer ul li a { font-size: 13px; color: #d8cfbf; transition: color 0.2s ease; }
.footer ul li a:hover { color: var(--orange); }
.footer-social { display: flex; gap: 10px; margin-top: 14px; }
.footer-social a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255, 255, 255, 0.08); display: flex; align-items: center; justify-content: center; transition: background 0.2s ease; }
.footer-social a:hover { background: var(--green); }
.footer-social svg { width: 18px; height: 18px; color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 20px; text-align: center; font-size: 12px; opacity: 0.7; line-height: 1.8; }
.footer-bottom a:hover { color: var(--orange); }

/* ===== 工具类 ===== */
.text-center { text-align: center; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .video-grid { columns: 3; }
  .creators-grid { grid-template-columns: repeat(3, 1fr); }
  .live-grid { grid-template-columns: repeat(2, 1fr); }
  .channel-grid { grid-template-columns: repeat(2, 1fr); }
  .benefit-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { height: 280px; }
  .hero-mushroom { width: 220px; height: 220px; }
  .story-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav-inner { flex-wrap: wrap; gap: 12px; padding: 12px 16px; }
  .nav-search { display: none; }
  .nav-links { order: 3; width: 100%; overflow-x: auto; }
  .nav-links a { padding: 6px 12px; font-size: 14px; }
  .container { padding: 0 16px; }
  .section { padding: 32px 0; }
  .hero { padding: 36px 0 44px; }
  .hero-text h1 { font-size: 30px; }
  .hero-text p { font-size: 15px; }
  .hero-stats { gap: 18px; }
  .hero-stats .stat-num { font-size: 20px; }
  .section-title { font-size: 20px; }
  .video-grid { columns: 2; column-gap: 12px; }
  .video-card { margin-bottom: 12px; }
  .video-title { font-size: 13px; }
  .topics { grid-template-columns: repeat(2, 1fr); }
  .creators-grid { grid-template-columns: repeat(2, 1fr); }
  .live-grid { grid-template-columns: 1fr; }
  .channel-grid { grid-template-columns: 1fr; }
  .benefit-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .page-banner { padding: 36px 0 40px; }
  .page-banner h1 { font-size: 26px; }
  .help-layout { grid-template-columns: 1fr; }
  .help-sidebar { position: static; }
  .ladder-row { grid-template-columns: 60px 1fr; gap: 10px; }
  .ladder-row .ladder-desc { display: none; }
  .ladder-row .ladder-income { grid-column: 2; text-align: left; }
  .form-row { grid-template-columns: 1fr; }
  .card { padding: 20px; }
}