/* 蘑菇视频 - 主样式文件 */
/* 全局重置与基础样式 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #1a9e8f;
    --primary-dark: #147a6e;
    --primary-light: #e8f7f5;
    --accent: #f47c3c;
    --accent-dark: #d4622a;
    --text-dark: #1a1a2e;
    --text-mid: #4a4a6a;
    --text-light: #7a7a9a;
    --bg-white: #ffffff;
    --bg-light: #f8fafb;
    --bg-section: #f0f7f6;
    --border: #e0e8e7;
    --shadow-sm: 0 2px 8px rgba(26,158,143,0.08);
    --shadow-md: 0 4px 20px rgba(26,158,143,0.12);
    --shadow-lg: 0 8px 40px rgba(26,158,143,0.18);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --transition: all 0.28s cubic-bezier(0.4,0,0.2,1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans CJK SC", sans-serif;
    color: var(--text-dark);
    background: var(--bg-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}
a:hover { color: var(--primary-dark); }

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

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

/* ===== 头部导航 ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: 20px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--primary);
    white-space: nowrap;
    flex-shrink: 0;
}

.site-logo img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: 8px;
}

.site-logo span {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.main-nav a {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-mid);
    transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary);
    background: var(--primary-light);
}

/* ===== 搜索框 ===== */
.header-search {
    display: flex;
    align-items: center;
    background: var(--bg-light);
    border: 1.5px solid var(--border);
    border-radius: 50px;
    padding: 6px 14px;
    gap: 8px;
    transition: var(--transition);
    min-width: 200px;
}

.header-search:focus-within {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(26,158,143,0.12);
}

.header-search input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.9rem;
    color: var(--text-dark);
    width: 100%;
}

.header-search input::placeholder { color: var(--text-light); }

.header-search button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    padding: 0;
    display: flex;
    align-items: center;
}

.header-search button:hover { color: var(--primary); }

/* 搜索下拉提示 */
.search-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 8px 0;
    z-index: 999;
    margin-top: 4px;
}

.search-dropdown.show { display: block; }

.search-dropdown-item {
    padding: 10px 16px;
    font-size: 0.9rem;
    color: var(--text-mid);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-dropdown-item:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.search-wrapper {
    position: relative;
    flex: 1;
    max-width: 280px;
}

/* 全宽搜索条（导航下方） */
.search-bar-full {
    background: var(--primary-light);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}

.search-bar-full .search-inner {
    display: flex;
    align-items: center;
    background: #fff;
    border: 1.5px solid var(--border);
    border-radius: 50px;
    padding: 10px 20px;
    gap: 10px;
    max-width: 680px;
    margin: 0 auto;
    transition: var(--transition);
}

.search-bar-full .search-inner:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,158,143,0.12);
}

.search-bar-full input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 1rem;
    color: var(--text-dark);
    width: 100%;
}

.search-bar-full button {
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 8px 20px;
    font-size: 0.9rem;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
}

.search-bar-full button:hover { background: var(--primary-dark); }

/* ===== Hero 主视觉 ===== */
.hero-section {
    position: relative;
    min-height: 560px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #0d7a6e 0%, #1a9e8f 50%, #2bbda8 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.22;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(13,122,110,0.88) 0%, rgba(26,158,143,0.72) 60%, rgba(43,189,168,0.55) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 680px;
    padding: 80px 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.18);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 50px;
    padding: 6px 16px;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 20px;
    backdrop-filter: blur(4px);
}

.hero-content h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 900;
    color: #fff;
    line-height: 1.25;
    margin-bottom: 18px;
    letter-spacing: -0.02em;
}

.hero-content p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.88);
    margin-bottom: 36px;
    max-width: 520px;
    line-height: 1.75;
}

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent);
    color: #fff;
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(244,124,60,0.4);
}

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(244,124,60,0.5);
    color: #fff;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.15);
    color: #fff;
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    border: 1.5px solid rgba(255,255,255,0.5);
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(4px);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.25);
    border-color: rgba(255,255,255,0.8);
    color: #fff;
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: 32px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.2);
}

.hero-stat-item {
    text-align: center;
}

.hero-stat-item .num {
    font-size: 1.8rem;
    font-weight: 900;
    color: #fff;
    line-height: 1;
}

.hero-stat-item .label {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.75);
    margin-top: 4px;
}

/* ===== 通用区块 ===== */
.section {
    padding: 80px 0;
}

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

.section-header {
    text-align: center;
    margin-bottom: 52px;
}

.section-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.82rem;
    font-weight: 700;
    padding: 5px 14px;
    border-radius: 50px;
    margin-bottom: 12px;
    letter-spacing: 0.05em;
}

.section-header h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 14px;
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: 1.05rem;
    color: var(--text-mid);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.75;
}

/* ===== 品牌故事 ===== */
.brand-story-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.brand-story-img {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.brand-story-img img {
    width: 100%;
    height: 380px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.brand-story-img:hover img { transform: scale(1.04); }

.brand-story-content h2 {
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 18px;
    line-height: 1.35;
}

.brand-story-content p {
    color: var(--text-mid);
    margin-bottom: 16px;
    line-height: 1.8;
    font-size: 0.98rem;
}

.brand-story-content .highlight {
    color: var(--primary);
    font-weight: 700;
}

/* ===== 产品卡片 ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.product-card-img {
    position: relative;
    overflow: hidden;
    height: 220px;
}

.product-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-card-img img { transform: scale(1.06); }

.product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 50px;
}

.product-card-body {
    padding: 22px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.product-card-body p {
    font-size: 0.9rem;
    color: var(--text-mid);
    line-height: 1.65;
    flex: 1;
}

.product-card-footer {
    padding: 16px 22px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.product-link {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.product-link:hover { color: var(--primary-dark); }

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

.video-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.video-thumb {
    position: relative;
    overflow: hidden;
    padding-top: 56.25%;
    background: #1a1a2e;
}

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

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

.video-play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.25);
    opacity: 0;
    transition: var(--transition);
}

.video-card:hover .video-play-btn { opacity: 1; }

.video-play-icon {
    width: 52px;
    height: 52px;
    background: rgba(255,255,255,0.92);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0.85);
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.video-card:hover .video-play-icon { transform: scale(1); }

.video-play-icon svg {
    width: 22px;
    height: 22px;
    fill: var(--primary);
    margin-left: 3px;
}

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    font-size: 0.75rem;
    padding: 2px 7px;
    border-radius: 4px;
}

.video-info {
    padding: 14px;
}

.video-info h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.78rem;
    color: var(--text-light);
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 3px;
}

/* ===== 场景展示 ===== */
.scenes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.scene-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    height: 300px;
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.scene-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.scene-card:hover img { transform: scale(1.06); }

.scene-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(13,50,45,0.85) 0%, transparent 55%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 24px;
}

.scene-overlay h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 6px;
}

.scene-overlay p {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.8);
    line-height: 1.5;
}

/* ===== 用户评价 ===== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.testimonial-quote {
    font-size: 2.5rem;
    color: var(--primary-light);
    line-height: 1;
    margin-bottom: 12px;
    font-family: Georgia, serif;
    color: var(--primary);
    opacity: 0.3;
}

.testimonial-card p {
    font-size: 0.95rem;
    color: var(--text-mid);
    line-height: 1.75;
    margin-bottom: 20px;
}

.testimonial-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    flex-shrink: 0;
}

.user-info .name {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text-dark);
}

.user-info .role {
    font-size: 0.8rem;
    color: var(--text-light);
}

.stars {
    color: #f5a623;
    font-size: 0.85rem;
    letter-spacing: 1px;
    margin-top: 2px;
}

/* ===== 媒体推荐 ===== */
.media-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.media-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 24px 20px;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.media-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.media-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
    font-size: 1.5rem;
}

.media-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.media-card p {
    font-size: 0.82rem;
    color: var(--text-light);
    line-height: 1.55;
}

/* ===== 购买指南 ===== */
.guide-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}

.guide-steps::before {
    content: '';
    position: absolute;
    top: 32px;
    left: 12.5%;
    right: 12.5%;
    height: 2px;
    background: linear-gradient(to right, var(--primary), var(--accent));
    z-index: 0;
}

.guide-step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-num {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 900;
    color: #fff;
    margin: 0 auto 16px;
    box-shadow: 0 4px 16px rgba(26,158,143,0.35);
    border: 3px solid #fff;
}

.guide-step h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.guide-step p {
    font-size: 0.87rem;
    color: var(--text-mid);
    line-height: 1.6;
}

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

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
    background: var(--bg-white);
}

.faq-item.open {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    padding: 18px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text-dark);
    gap: 12px;
    user-select: none;
}

.faq-question:hover { color: var(--primary); }

.faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    transition: var(--transition);
    line-height: 1;
}

.faq-item.open .faq-icon {
    background: var(--primary);
    color: #fff;
    transform: rotate(45deg);
}

.faq-answer {
    display: none;
    padding: 0 22px 18px;
    font-size: 0.93rem;
    color: var(--text-mid);
    line-height: 1.75;
    border-top: 1px solid var(--border);
    padding-top: 14px;
}

.faq-item.open .faq-answer { display: block; }

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.contact-info p {
    font-size: 0.95rem;
    color: var(--text-mid);
    margin-bottom: 28px;
    line-height: 1.75;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.contact-item-icon {
    width: 44px;
    height: 44px;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.contact-item-text .label {
    font-size: 0.82rem;
    color: var(--text-light);
    margin-bottom: 2px;
}

.contact-item-text .value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
}

.contact-form {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.contact-form h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 22px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-mid);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 11px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.93rem;
    color: var(--text-dark);
    background: var(--bg-light);
    outline: none;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(26,158,143,0.1);
}

.form-group textarea { resize: vertical; min-height: 100px; }

.btn-submit {
    width: 100%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 13px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(26,158,143,0.3);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(26,158,143,0.4);
}

/* ===== 页脚 ===== */
.site-footer {
    background: var(--text-dark);
    color: rgba(255,255,255,0.75);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .site-logo {
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand .site-logo span {
    background: linear-gradient(135deg, #4dd9c8, #f47c3c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.75;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.social-btn {
    width: 38px;
    height: 38px;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    font-size: 1rem;
    transition: var(--transition);
    text-decoration: none;
}

.social-btn:hover {
    background: var(--primary);
    color: #fff;
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 18px;
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col ul li a {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.6);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-bottom {
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.83rem;
    color: rgba(255,255,255,0.45);
    flex-wrap: wrap;
    gap: 10px;
}

.footer-bottom a {
    color: rgba(255,255,255,0.45);
}

.footer-bottom a:hover { color: var(--primary); }

/* ===== 特性卡片 ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 28px 22px;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-light), rgba(244,124,60,0.1));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    font-size: 1.8rem;
}

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 0.88rem;
    color: var(--text-mid);
    line-height: 1.65;
}

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: 14px 0;
    font-size: 0.85rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--text-light);
}

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

.breadcrumb .sep { color: var(--border); }

.breadcrumb .current { color: var(--text-mid); }

/* ===== 内页标题区 ===== */
.page-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 60px 0;
    text-align: center;
    color: #fff;
}

.page-hero h1 {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 800;
    margin-bottom: 12px;
}

.page-hero p {
    font-size: 1.05rem;
    opacity: 0.88;
    max-width: 520px;
    margin: 0 auto;
}

/* ===== 内页内容 ===== */
.inner-content {
    padding: 60px 0;
}

.inner-grid {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 40px;
    align-items: start;
}

.inner-sidebar {
    position: sticky;
    top: 88px;
}

.sidebar-nav {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.sidebar-nav-title {
    padding: 16px 20px;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-light);
    background: var(--bg-section);
    border-bottom: 1px solid var(--border);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.sidebar-nav ul {
    list-style: none;
    padding: 8px 0;
}

.sidebar-nav ul li a {
    display: block;
    padding: 10px 20px;
    font-size: 0.9rem;
    color: var(--text-mid);
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.sidebar-nav ul li a:hover,
.sidebar-nav ul li a.active {
    color: var(--primary);
    background: var(--primary-light);
    border-left-color: var(--primary);
}

.inner-main h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-light);
}

.inner-main h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 28px 0 12px;
}

.inner-main p {
    font-size: 0.95rem;
    color: var(--text-mid);
    line-height: 1.8;
    margin-bottom: 16px;
}

.inner-main ul, .inner-main ol {
    padding-left: 22px;
    margin-bottom: 16px;
}

.inner-main li {
    font-size: 0.95rem;
    color: var(--text-mid);
    line-height: 1.75;
    margin-bottom: 6px;
}

.content-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}

/* ===== 下载卡片 ===== */
.download-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.download-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.download-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.download-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 2rem;
}

.download-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.download-card p {
    font-size: 0.87rem;
    color: var(--text-mid);
    margin-bottom: 18px;
    line-height: 1.6;
}

.version-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 50px;
    margin-bottom: 16px;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    padding: 11px 22px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(26,158,143,0.35);
    color: #fff;
}

/* ===== 更新日志 ===== */
.changelog-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.changelog-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 24px;
    padding: 28px 0;
    border-bottom: 1px solid var(--border);
    position: relative;
}

.changelog-item:last-child { border-bottom: none; }

.changelog-version {
    text-align: right;
    padding-right: 24px;
    border-right: 2px solid var(--border);
    position: relative;
}

.changelog-version::after {
    content: '';
    position: absolute;
    right: -6px;
    top: 6px;
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 0 0 2px var(--primary);
}

.changelog-version .ver {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary);
}

.changelog-version .date {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 4px;
}

.changelog-content h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.changelog-content ul {
    list-style: none;
    padding: 0;
}

.changelog-content ul li {
    font-size: 0.9rem;
    color: var(--text-mid);
    padding: 4px 0;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.changelog-content ul li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 700;
    flex-shrink: 0;
}

/* ===== 教程步骤 ===== */
.tutorial-steps {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.tutorial-step {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 20px;
    align-items: start;
}

.step-circle {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 900;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(26,158,143,0.3);
}

.step-body h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
    padding-top: 12px;
}

.step-body p {
    font-size: 0.92rem;
    color: var(--text-mid);
    line-height: 1.7;
}

/* ===== 通知提示 ===== */
.notice-box {
    background: var(--primary-light);
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 14px 18px;
    margin: 20px 0;
    font-size: 0.9rem;
    color: var(--primary-dark);
    line-height: 1.65;
}

/* ===== 汉堡菜单（移动端） ===== */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .videos-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .media-grid { grid-template-columns: repeat(2, 1fr); }
    .guide-steps { grid-template-columns: repeat(2, 1fr); }
    .guide-steps::before { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .download-cards { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hamburger { display: flex; }
    .main-nav {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 12px 16px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        z-index: 999;
    }
    .main-nav.open { display: flex; }
    .main-nav a { padding: 12px 16px; width: 100%; }
    .search-wrapper { display: none; }
    .brand-story-grid { grid-template-columns: 1fr; }
    .products-grid { grid-template-columns: 1fr; }
    .scenes-grid { grid-template-columns: 1fr; }
    .testimonials-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .inner-grid { grid-template-columns: 1fr; }
    .inner-sidebar { position: static; }
    .hero-stats { gap: 20px; }
    .hero-stat-item .num { font-size: 1.4rem; }
    .footer-grid { grid-template-columns: 1fr; }
    .download-cards { grid-template-columns: 1fr; }
    .changelog-item { grid-template-columns: 1fr; }
    .changelog-version { text-align: left; border-right: none; border-bottom: 1px solid var(--border); padding-right: 0; padding-bottom: 10px; margin-bottom: 10px; }
    .changelog-version::after { display: none; }
    .videos-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-content h1 { font-size: 1.7rem; }
    .hero-actions { flex-direction: column; }
    .btn-primary, .btn-outline { width: 100%; justify-content: center; }
    .section { padding: 52px 0; }
    .guide-steps { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .media-grid { grid-template-columns: 1fr; }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ===== 视频模态框 ===== */
.video-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.video-modal.show { display: flex; }

.video-modal-inner {
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    width: 90%;
    max-width: 800px;
    position: relative;
}

.video-modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.15);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
    transition: var(--transition);
}

.video-modal-close:hover { background: rgba(255,255,255,0.3); }

.video-player-placeholder {
    width: 100%;
    padding-top: 56.25%;
    position: relative;
    background: #111;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-player-placeholder .play-center {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
}

.play-center-icon {
    width: 80px;
    height: 80px;
    background: rgba(26,158,143,0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.play-center-icon svg {
    width: 36px;
    height: 36px;
    fill: #fff;
    margin-left: 4px;
}