/* ========================================
   PVWANT 光伏学堂 - 主样式表
   配色：柔和石板蓝 + 暖金色
   ======================================== */

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ---------- 防闪烁：数据未加载完成前隐藏动态元素 ---------- */
.js-render { visibility: hidden; }
.js-ready .js-render { visibility: visible; }

:root {
    /* ── 背景层次（柔和石板蓝） ── */
    --bg-deepest: #252d42;
    --bg-primary: #2e374f;
    --bg-secondary: #36415c;
    --bg-card: #3e4b69;
    --bg-card-hover: #475576;
    --bg-elevated: #515f83;
    --bg-input: #303a54;
    --border: rgba(255,255,255,0.08);
    --border-light: rgba(255,255,255,0.14);

    /* ── 文字 ── */
    --text-primary: #ffffff;
    --text-secondary: #9aa4bf;
    --text-muted: #6b7da0;

    /* ── 金色系 ── */
    --gold-pale: #fef3c7;
    --gold-light: #f0a500;
    --gold-mid: #e8a817;
    --gold: #d49300;
    --gold-deep: #b07a00;
    --gold-glow: rgba(212, 147, 0, 0.3);

    /* ── 蓝色系 ── */
    --cyan-light: #5dd3f0;
    --cyan: #00b4d8;
    --cyan-deep: #008ba3;
    --cyan-glow: rgba(0, 180, 216, 0.2);

    /* ── 功能色 ── */
    --green: #2ecc71;
    --red: #e74c3c;
    --warm-orange: #ff8c42;

    /* ── 渐变 ── */
    --gradient-gold: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 50%, #ffc940 100%);
    --gradient-dark: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-card) 100%);
    --gradient-hero: linear-gradient(180deg, var(--bg-deepest) 0%, var(--bg-secondary) 40%, var(--bg-card) 100%);

    /* ── 圆角 / 阴影 / 过渡 ── */
    --radius: 12px;
    --radius-lg: 20px;
    --shadow-gold: 0 4px 30px rgba(212, 147, 0, 0.2);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── 清新浅绿主题（MSteel 浅绿风格） ── */
:root[data-theme="msteel"] {
    --bg-deepest: #b8d9b0;
    --bg-primary: #e8f5e9;
    --bg-secondary: #dcedc8;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f8e9;
    --bg-elevated: #a5d6a7;
    --bg-input: #f0f4ec;
    --border: rgba(0,0,0,0.08);
    --border-light: rgba(0,0,0,0.14);
    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --gold-pale: #e8f5e9;
    --gold-light: #66bb6a;
    --gold-mid: #4caf50;
    --gold: #388e3c;
    --gold-deep: #2e7d32;
    --gold-glow: rgba(56, 142, 60, 0.25);
    --cyan-light: #80deea;
    --cyan: #26c6da;
    --cyan-deep: #00838f;
    --cyan-glow: rgba(38, 198, 218, 0.15);
    --green: #43a047;
    --red: #e53935;
    --warm-orange: #ff7043;
    --gradient-gold: linear-gradient(135deg, #388e3c 0%, #4caf50 50%, #66bb6a 100%);
    --gradient-dark: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-card) 100%);
    --gradient-hero: linear-gradient(180deg, #c8e6c9 0%, #dcedc8 40%, #e8f5e9 100%);
    --radius: 12px;
    --radius-lg: 20px;
    --shadow-gold: 0 4px 30px rgba(56, 142, 60, 0.2);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── 清新自然主题 ── */
:root[data-theme="nature"] {
    --bg-deepest: #dce8d5;
    --bg-primary: #f7faf5;
    --bg-secondary: #eef4eb;
    --bg-card: #ffffff;
    --bg-card-hover: #f4f9f1;
    --bg-elevated: #c8dcc0;
    --bg-input: #f0f5ec;
    --border: rgba(0,0,0,0.07);
    --border-light: rgba(0,0,0,0.13);
    --text-primary: #1a1f18;
    --text-secondary: #5c6b55;
    --text-muted: #8c9b85;
    --gold-pale: #e8f5e9;
    --gold-light: #81c784;
    --gold-mid: #66bb6a;
    --gold: #43a047;
    --gold-deep: #2e7d32;
    --gold-glow: rgba(67, 160, 71, 0.22);
    --cyan-light: #90caf9;
    --cyan: #42a5f5;
    --cyan-deep: #1565c0;
    --cyan-glow: rgba(66, 165, 245, 0.12);
    --green: #66bb6a;
    --red: #ef5350;
    --warm-orange: #ff7043;
    --gradient-gold: linear-gradient(135deg, #2e7d32 0%, #43a047 40%, #81c784 100%);
    --gradient-dark: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-card) 100%);
    --gradient-hero: linear-gradient(180deg, #eef4eb 0%, #f0f5ec 40%, #f7faf5 100%);
    --radius: 12px;
    --radius-lg: 20px;
    --shadow-gold: 0 4px 30px rgba(67, 160, 71, 0.2);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* ---------- Header ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.header.scrolled {
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-icon {
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    line-height: 1;
    width: 32px; height: 32px;
    filter: drop-shadow(0 0 8px rgba(240, 165, 0, 0.5));
}
.js-ready .logo-icon {
    display: inline-flex;
}
.logo-icon .custom-icon {
    width: 28px; height: 28px; object-fit: contain;
    filter: none;
}

.logo-text {
    font-size: 24px;
    line-height: 1;
    font-weight: 900;
    letter-spacing: 2px;
    color: var(--text-primary);
}

.logo-highlight {
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--gold-light);
    background: rgba(212, 147, 0, 0.08);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--gradient-hero);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
}

.hero-glow-1 {
    width: 600px;
    height: 600px;
    background: var(--gold);
    top: -200px;
    right: -100px;
    animation: floatGlow 8s ease-in-out infinite;
}

.hero-glow-2 {
    width: 400px;
    height: 400px;
    background: var(--cyan);
    bottom: -100px;
    left: -100px;
    animation: floatGlow 6s ease-in-out reverse infinite;
}

@keyframes floatGlow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 10;
    padding: 120px 0 80px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 20px;
    border: 1px solid rgba(212, 147, 0, 0.3);
    border-radius: 50px;
    font-size: 13px;
    color: var(--gold-light);
    margin-bottom: 32px;
    background: rgba(212, 147, 0, 0.05);
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gold-light);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(240, 165, 0, 0.4); }
    50% { opacity: 0.6; box-shadow: 0 0 0 10px rgba(240, 165, 0, 0); }
}

.hero-title {
    font-size: clamp(42px, 8vw, 72px);
    font-weight: 900;
    letter-spacing: 4px;
    margin-bottom: 20px;
    background: linear-gradient(180deg, #fff 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(16px, 2.5vw, 20px);
    color: var(--gold-light);
    margin-bottom: 20px;
    font-weight: 500;
    letter-spacing: 2px;
}

.hero-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    letter-spacing: 1px;
}

.btn-primary {
    background: var(--gradient-gold);
    color: var(--bg-primary);
    box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 40px rgba(212, 147, 0, 0.4);
}

.btn-outline {
    border: 1.5px solid rgba(255,255,255,0.2);
    color: var(--text-primary);
    background: transparent;
}

.btn-outline:hover {
    border-color: var(--gold-light);
    color: var(--gold-light);
    transform: translateY(-2px);
    background: rgba(212, 147, 0, 0.05);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

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

.stat-number {
    display: block;
    font-size: 32px;
    font-weight: 900;
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-light);
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 2px;
    animation: bounceDown 2s ease-in-out infinite;
    z-index: 10;
}

@keyframes bounceDown {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ---------- Section ---------- */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--gold-light);
    margin-bottom: 16px;
    font-weight: 500;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 900;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 16px;
    max-width: 500px;
    margin: 0 auto;
}

/* ---------- Software Grid ---------- */
.section-software {
    background: var(--bg-secondary);
}

.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
}

.software-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.software-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-gold);
    transform: scaleX(0);
    transition: transform 0.4s ease;
    transform-origin: left;
}

.software-card:hover::before {
    transform: scaleX(1);
}

.software-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(212, 147, 0, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.software-card-icon {
    font-size: 36px;
    margin-bottom: 16px;
    display: block;
}
.software-card-icon .custom-icon {
    width: 48px; height: 48px; object-fit: contain; vertical-align: middle;
}

.software-card-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.software-card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Card arrow indicator */
.card-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(212, 147, 0, 0.1);
    color: var(--gold-light);
    font-size: 14px;
    font-weight: 700;
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity 0.3s, transform 0.3s;
}
.software-card:hover .card-arrow,
.course-card:hover .card-arrow {
    opacity: 1;
    transform: translateX(0);
}
.course-card-meta .card-arrow {
    margin-left: auto;
}

.software-card-number {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 48px;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.02);
    line-height: 1;
}

/* ---------- Stats Bar (from Hero) ---------- */
.section-stats {
    padding: 0 0 100px 0;
    background: var(--bg-primary);
}
.stats-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
    padding: 40px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

/* ---------- Courses Section ---------- */
.section-courses {
    background: var(--bg-primary);
    position: relative;
}

.section-courses::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.03) 0%, transparent 70%);
    pointer-events: none;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.course-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-gold);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.course-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 180, 216, 0.2);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.course-card:hover::after {
    opacity: 1;
}

.course-card-icon {
    font-size: 42px;
    margin-bottom: 20px;
}
.course-card-icon .custom-icon {
    width: 56px; height: 56px; object-fit: contain; vertical-align: middle;
}

.course-card-name {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
}

.course-card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.course-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.course-duration {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(0, 180, 216, 0.1);
    border-radius: 50px;
    font-size: 13px;
    color: var(--cyan);
    font-weight: 500;
}

.course-tag {
    padding: 6px 14px;
    background: rgba(212, 147, 0, 0.1);
    border-radius: 50px;
    font-size: 12px;
    color: var(--gold-light);
}

/* ---------- Features ---------- */
.section-features {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    text-align: center;
    padding: 40px 28px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: rgba(212, 147, 0, 0.15);
    background: rgba(212, 147, 0, 0.03);
}

.feature-icon {
    font-size: 44px;
    margin-bottom: 18px;
}
.feature-icon .custom-icon {
    width: 56px; height: 56px; object-fit: contain; vertical-align: middle;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ---------- Quick Links (首页快速入口) ---------- */
.section-quick-links {
    background: var(--bg-secondary);
}

.quick-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.quick-link-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: block;
}

.quick-link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-gold);
    opacity: 0;
    transition: opacity 0.3s;
}

.quick-link-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(212, 147, 0, 0.3);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.quick-link-card:hover::before { opacity: 1; }

.quick-link-icon {
    font-size: 52px;
    margin-bottom: 20px;
    display: block;
}

.quick-link-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.quick-link-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.quick-link-arrow {
    display: inline-block;
    color: var(--gold-light);
    font-size: 14px;
    font-weight: 600;
    transition: transform 0.3s;
}

.quick-link-card:hover .quick-link-arrow {
    transform: translateX(6px);
}

/* ---------- 下载模块 ---------- */
.section-dl {
    padding: 60px 0;
}

.dl-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 860px;
    margin: 0 auto;
}

.dl-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
    flex-wrap: wrap;
}

.dl-item:hover {
    border-color: var(--border-light);
    background: var(--bg-card-hover);
}

.dl-item-num {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-muted);
    min-width: 32px;
    text-align: center;
    flex-shrink: 0;
}

.dl-item-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
}

.dl-item-icon {
    font-size: 28px;
    flex-shrink: 0;
}
.dl-item-icon .custom-icon {
    width: 32px; height: 32px; object-fit: contain; vertical-align: middle;
}

.dl-item-text {
    min-width: 0;
}

.dl-item-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dl-item-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dl-item-contact {
    font-size: 13px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.dl-item-contact a {
    color: var(--gold-light);
    text-decoration: none;
}

.dl-item-contact a:hover {
    text-decoration: underline;
}

/* 下载模块：文字描述（非URL时显示） */
.dl-item-note {
    font-size: 13px;
    color: var(--gold-light);
    background: rgba(212, 147, 0, 0.08);
    border: 1px solid rgba(212, 147, 0, 0.2);
    border-radius: 8px;
    padding: 8px 18px;
    flex-shrink: 0;
    white-space: nowrap;
}

.btn-dl-list {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    border: none;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-dl-list:hover {
    box-shadow: var(--shadow-gold);
    transform: translateY(-2px);
}

@media (max-width: 600px) {
    .dl-item {
        padding: 14px 16px;
        gap: 10px;
    }
    .dl-item-num { font-size: 16px; min-width: 24px; }
    .dl-item-icon { font-size: 22px; }
    .dl-item-name { font-size: 14px; }
    .dl-item-desc { font-size: 12px; }
    .btn-dl-list {
        width: 100%;
        justify-content: center;
        padding: 10px 16px;
        font-size: 13px;
    }
    .dl-item-contact {
        width: 100%;
        text-align: center;
    }
    .dl-item-note {
        width: 100%;
        text-align: center;
        padding: 10px 16px;
        font-size: 13px;
    }
}

/* ---------- Contact ---------- */
.section-contact {
    background: var(--bg-primary);
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
}

.contact-card:hover {
    border-color: rgba(212, 147, 0, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}

.contact-card-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(212, 147, 0, 0.08);
    color: var(--gold-light);
}

.contact-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.contact-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--gold-light);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.contact-tip {
    font-size: 13px;
    color: var(--text-muted);
}

/* ---------- Exchange Groups (技术交流) ---------- */
.section-exchange-groups {
    background: var(--bg-secondary);
    padding: 60px 0;
}

.exchange-groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.exchange-group-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.exchange-group-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-gold);
    transform: scaleX(0);
    transition: transform 0.4s ease;
    transform-origin: left;
}

.exchange-group-card:hover {
    border-color: rgba(212, 147, 0, 0.25);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.exchange-group-card:hover::before {
    transform: scaleX(1);
}

.exchange-group-icon {
    font-size: 52px;
    margin-bottom: 16px;
    display: block;
}
.exchange-group-icon .custom-icon {
    width: 64px; height: 64px; object-fit: contain; vertical-align: middle;
}

.exchange-group-tag {
    display: inline-block;
    padding: 4px 16px;
    background: rgba(212, 147, 0, 0.1);
    color: var(--gold-light);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 14px;
}

.exchange-group-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.exchange-group-card > p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.exchange-group-id {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-elevated);
    border-radius: 50px;
}

.exchange-group-label {
    font-size: 13px;
    color: var(--text-muted);
}

.exchange-group-value {
    font-size: 16px;
    font-weight: 700;
    color: var(--gold-light);
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 1px;
    position: relative;
}

.exchange-group-value:hover {
    color: #fff;
    transform: scale(1.05);
}

.exchange-group-value.copyable::after {
    content: '✅ 已复制';
    position: absolute;
    bottom: -28px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    color: var(--green);
    opacity: 0;
    transition: opacity 0.2s;
    white-space: nowrap;
    font-weight: 400;
}

.exchange-group-value.copyable.copied::after {
    opacity: 1;
}

.exchange-group-value.copied {
    color: var(--green) !important;
}

.exchange-copy-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 8px;
    opacity: 0.7;
}
.exchange-tip {
    text-align: center;
    margin-top: 32px;
}

.exchange-tip p {
    font-size: 14px;
    color: var(--text-muted);
}

/* ── 清新浅绿主题 技术交流 ── */
[data-theme="msteel"] .exchange-group-card:hover { border-color: rgba(56,142,60,0.25); }
[data-theme="msteel"] .exchange-group-tag { background: rgba(56,142,60,0.1); }
[data-theme="msteel"] .exchange-group-value { color: #2e7d32; }
[data-theme="msteel"] .exchange-group-value.copyable::after { color: #43a047; }

/* ── 清新自然主题 技术交流 ── */
[data-theme="nature"] .exchange-group-card:hover { border-color: rgba(67,160,71,0.22); }
[data-theme="nature"] .exchange-group-tag { background: rgba(67,160,71,0.08); }
[data-theme="nature"] .exchange-group-value { color: #2e7d32; }
[data-theme="nature"] .exchange-group-value.copyable::after { color: #66bb6a; }

/* ---------- News Timeline ---------- */
.section-news {
    background: var(--bg-primary);
}
.news-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding-left: 32px;
}
.news-timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg,
        rgba(212,147,0,0.3) 0%,
        rgba(0,180,216,0.15) 50%,
        rgba(212,147,0,0.05) 100%
    );
    border-radius: 1px;
}
.news-item {
    position: relative;
    padding: 20px 24px;
    margin-bottom: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}
.news-item:last-child { margin-bottom: 0; }
.news-item:hover {
    border-color: rgba(212,147,0,0.18);
    background: var(--bg-card-hover);
    transform: translateX(4px);
}
.news-item::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 28px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gold);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 8px rgba(212,147,0,0.4);
}
.news-item-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}
.news-date {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 1px;
}
.news-tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
}
.news-tag.version { background: rgba(0,180,216,0.12); color: var(--cyan); }
.news-tag.course { background: rgba(46,204,113,0.12); color: var(--green); }
.news-tag.publish { background: rgba(212,147,0,0.12); color: var(--gold-light); }
.news-item h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}
.news-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ---------- Cases Section ---------- */
.section-cases {
    background: var(--bg-secondary);
}
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}
.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(212,147,0,0.06) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(40px, -40px);
}
.case-card:hover {
    border-color: rgba(212,147,0,0.2);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}
.case-card-icon {
    font-size: 44px;
    margin-bottom: 16px;
    display: block;
}
.case-card-icon .custom-icon {
    width: 56px; height: 56px; object-fit: contain; vertical-align: middle;
}
.case-card-tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
    background: rgba(212,147,0,0.12);
    color: var(--gold-light);
    margin-bottom: 14px;
}
.case-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
    line-height: 1.4;
}
.case-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}
.case-card-metrics {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(0,180,216,0.08);
    border-radius: 50px;
    font-size: 12px;
    color: var(--cyan);
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* ---------- 合作方式 ---------- */
.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}
.cooperation-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
}
.cooperation-card:hover {
    border-color: rgba(212,147,0,0.2);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}
.cooperation-card-icon {
    font-size: 44px;
    margin-bottom: 16px;
    display: block;
}
.cooperation-card-icon .custom-icon {
    width: 56px; height: 56px; object-fit: contain; vertical-align: middle;
}
.cooperation-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}
.cooperation-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 14px;
}
.cooperation-card-features {
    list-style: none;
    padding: 0;
    margin: 0;
}
.cooperation-card-features li {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 5px 0;
    padding-left: 18px;
    position: relative;
}
.cooperation-card-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--gold-light);
    font-weight: 700;
}

/* ---------- Floating Trial Button ---------- */
.floating-trial {
    position: fixed;
    bottom: 96px;
    right: 32px;
    z-index: 998;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--gradient-gold);
    color: var(--bg-primary);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 1px;
    box-shadow: var(--shadow-gold);
    transition: all 0.3s ease;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}
.floating-trial.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.floating-trial:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 35px rgba(212,147,0,0.5);
}
.floating-trial:active {
    transform: translateY(0) scale(0.98);
}
@media (max-width: 768px) {
    .floating-trial {
        bottom: 80px;
        right: 16px;
        padding: 10px 16px;
        font-size: 12px;
    }
    .floating-trial-text { display: none; }
}

/* ---------- Detail Page: Screenshot Preview ---------- */
.detail-screenshots {
    max-width: 860px;
    margin: 0 auto 48px;
    padding: 0 16px;
}
.detail-screenshots h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--gold-light);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    letter-spacing: 1px;
}
.detail-screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}
.detail-screenshot-item {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
    background: var(--bg-card);
}
.detail-screenshot-item:hover {
    border-color: var(--gold);
    box-shadow: 0 6px 24px rgba(212,147,0,0.15);
    transform: scale(1.02);
}
.detail-screenshot-item img {
    width: 100%;
    height: 200px;
    object-fit: contain;
    display: block;
    background: var(--bg-input);
}
.detail-screenshot-item .no-image {
    width: 100%;
    height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-muted);
    background: var(--bg-input);
}
.detail-screenshot-item .no-image .no-image-icon {
    font-size: 48px;
    line-height: 1;
}
.detail-screenshot-item .no-image .no-image-icon .custom-icon {
    width: 56px; height: 56px; object-fit: contain; vertical-align: middle;
}
.detail-screenshot-item .no-image .no-image-text {
    font-size: 13px;
    color: var(--text-secondary);
    max-width: 90%;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Lightbox */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(0,0,0,0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    animation: fadeInLightbox 0.25s ease;
}
@keyframes fadeInLightbox {
    from { opacity: 0; } to { opacity: 1; }
}
.lightbox-overlay img {
    max-width: 90vw;
    max-height: 85vh;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.6);
    animation: scaleInLightbox 0.3s ease;
}
@keyframes scaleInLightbox {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}
.lightbox-close {
    position: absolute;
    top: 24px;
    right: 32px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.lightbox-close:hover { background: rgba(255,255,255,0.2); }

/* ---------- Footer ---------- */
.footer {
    background: var(--bg-deepest);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 10px;
}

.footer-links {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--gold-light);
    letter-spacing: 1px;
}

.footer-col ul li {
    margin-bottom: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}
.footer-col ul li a {
    color: var(--text-secondary);
    transition: color 0.2s;
}
.footer-col ul li a:hover {
    color: var(--gold-light);
}

/* 页脚折叠 */
.footer-collapsible .footer-hidden { display: none; }
.footer-collapsible.expanded .footer-hidden { display: list-item; }
.footer-toggle {
    display: inline-block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--gold-light);
    cursor: pointer;
    user-select: none;
    transition: color 0.2s;
}
.footer-toggle:hover { color: #fff; }

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}

/* ---------- Copyable Contact ---------- */
.contact-value.copyable {
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}
.contact-value.copyable:hover {
    transform: scale(1.05);
    color: var(--text-primary);
}
.contact-value.copyable::after {
    content: '✅ 已复制';
    position: absolute;
    bottom: -22px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    color: var(--green);
    opacity: 0;
    transition: opacity 0.2s;
    white-space: nowrap;
}
.contact-value.copyable.copied::after {
    opacity: 1;
}
.contact-value.copied {
    color: var(--green) !important;
}
.contact-value.copied + .contact-tip {
    visibility: hidden;
}

/* ---------- Back to Top ---------- */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--gold-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s, background 0.2s, border-color 0.2s;
}
.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.back-to-top:hover {
    background: var(--bg-card-hover);
    border-color: var(--gold);
    transform: translateY(-3px);
    box-shadow: 0 4px 20px rgba(212, 147, 0, 0.2);
}

/* ---------- Detail Page ---------- */
.detail-breadcrumb {
    padding: 100px 0 20px;
    font-size: 13px;
    color: var(--text-muted);
}
.detail-breadcrumb a {
    color: var(--gold-light);
    transition: color 0.2s;
}
.detail-breadcrumb a:hover { color: var(--gold); }
.detail-breadcrumb .sep {
    margin: 0 8px;
    color: var(--border-light);
}

.detail-main {
    min-height: 60vh;
    padding-bottom: 60px;
}

.detail-loading {
    text-align: center;
    padding: 80px 0;
    color: var(--text-secondary);
}
.spinner {
    width: 40px; height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--gold-light);
    border-radius: 50%;
    margin: 0 auto 16px;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.detail-content {
    animation: detailFadeIn 0.5s ease;
}
@keyframes detailFadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Detail Hero */
.detail-hero {
    text-align: center;
    padding: 48px 0;
    position: relative;
}
.detail-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 2px;
    background: var(--gradient-gold);
    border-radius: 1px;
}
.detail-icon {
    font-size: 64px;
    margin-bottom: 16px;
    display: block;
}
.detail-icon .custom-icon {
    width: 80px; height: 80px; object-fit: contain; vertical-align: middle;
}
.detail-badge {
    display: inline-block;
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 2px;
    background: rgba(212, 147, 0, 0.08);
    color: var(--gold-light);
    border: 1px solid rgba(212, 147, 0, 0.2);
    margin-bottom: 20px;
}
.detail-title {
    font-size: clamp(28px, 5vw, 44px);
    font-weight: 900;
    margin-bottom: 12px;
    letter-spacing: 2px;
}
.detail-tagline {
    font-size: 18px;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Detail Sections */
.detail-section {
    max-width: 860px;
    margin: 0 auto 48px;
    padding: 0 16px;
}
.detail-h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--gold-light);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    letter-spacing: 1px;
}
.detail-intro {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-secondary);
}

/* Features List */
.detail-features {
    list-style: none;
    display: grid;
    gap: 14px;
}
.detail-features li {
    position: relative;
    padding: 16px 20px 16px 48px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 15px;
    color: var(--text-secondary);
    transition: var(--transition);
    line-height: 1.6;
}
.detail-features li::before {
    content: '✓';
    position: absolute;
    left: 18px;
    top: 16px;
    color: var(--gold-light);
    font-weight: 700;
    font-size: 16px;
}
.detail-features li:hover {
    border-color: rgba(212, 147, 0, 0.2);
    background: var(--bg-card-hover);
}
.detail-features li .lesson-num {
    position: absolute;
    left: 14px;
    top: 14px;
    width: 26px;
    height: 26px;
    border-radius: 6px;
    background: var(--gradient-gold);
    color: var(--bg-primary);
    font-size: 12px;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
}
.detail-features li .lesson-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}
.detail-features li .lesson-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px solid var(--border);
}
.detail-features li.highlight {
    padding-left: 48px;
}
.detail-features li.highlight::before {
    content: none;
}
.detail-features li .hl-icon {
    position: absolute;
    left: 18px;
    top: 16px;
    color: var(--gold-light);
    font-weight: 700;
    font-size: 16px;
}

/* Specs Table */
.detail-specs {
    display: flex;
    flex-direction: column;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.spec-row {
    display: flex;
    border-bottom: 1px solid var(--border);
}
.spec-row:last-child { border-bottom: none; }
.spec-label {
    flex: 0 0 180px;
    padding: 14px 20px;
    background: rgba(255,255,255,0.02);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 1px;
}
.spec-value {
    flex: 1;
    padding: 14px 20px;
    font-size: 14px;
    color: var(--text-secondary);
}

.detail-suit, .detail-duration {
    margin-top: 24px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.detail-suit h4, .detail-duration h4 {
    font-size: 15px;
    color: var(--gold-light);
    margin-bottom: 8px;
}
.detail-suit p, .detail-duration p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Detail CTA */
.detail-cta {
    max-width: 860px;
    margin: 60px auto 0;
    padding: 48px 32px;
    text-align: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}
.detail-cta h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}
.detail-cta p {
    color: var(--text-secondary);
    margin-bottom: 28px;
}
.detail-cta-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
    align-items: center;
}
/* 详情页下载按钮 */
.btn-dl-detail {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 30px;
    color: var(--gold-light);
    background: rgba(212, 147, 0, 0.08);
    border: 1px solid rgba(212, 147, 0, 0.25);
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
}
.btn-dl-detail:hover {
    background: rgba(212, 147, 0, 0.18);
    border-color: rgba(212, 147, 0, 0.5);
    color: #fff;
    box-shadow: 0 0 16px rgba(212, 147, 0, 0.2);
}
/* 详情页：dl 为文字描述时 */
.btn-dl-note {
    color: var(--gold-light) !important;
    background: rgba(212, 147, 0, 0.08) !important;
    border: 1px solid rgba(212, 147, 0, 0.2) !important;
    cursor: default;
    pointer-events: none;
}
.detail-contact-info {
    font-size: 14px;
    color: var(--text-muted);
}
.detail-contact-info strong {
    color: var(--gold-light);
    font-size: 15px;
}
.detail-contact-info .divider {
    margin: 0 12px;
    color: var(--border-light);
}

.detail-back {
    text-align: center;
    margin-top: 40px;
}

/* Detail Highlights List */
.detail-highlights {
    margin-bottom: 0;
}

/* ---------- Page Hero（子页面顶部横幅）---------- */
.page-hero {
    position: relative;
    padding: 140px 0 60px;
    text-align: center;
    background: var(--gradient-hero);
    overflow: hidden;
}

.page-hero-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

.page-hero-content {
    position: relative;
    z-index: 1;
}

.page-hero-content h1 {
    font-size: clamp(32px, 6vw, 52px);
    font-weight: 900;
    letter-spacing: 3px;
    margin: 16px 0;
    background: linear-gradient(180deg, #fff 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-hero-content p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ---------- About: 平台介绍 ---------- */
.section-about-intro {
    padding: 80px 0;
    background: var(--bg-primary);
}

.about-intro-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.about-intro-text h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.about-intro-text p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.text-highlight {
    color: var(--gold-light);
    font-weight: 600;
}

.about-intro-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.about-stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

.about-stat-card:hover {
    border-color: rgba(212, 147, 0, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.about-stat-num {
    display: block;
    font-size: 36px;
    font-weight: 900;
    color: var(--gold-light);
    margin-bottom: 8px;
}

.about-stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ---------- About: 核心优势 ---------- */
.section-about-values {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.about-values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.about-value-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
}

.about-value-card:hover {
    border-color: rgba(212, 147, 0, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.about-value-icon {
    font-size: 40px;
    margin-bottom: 16px;
    display: block;
}
.about-value-icon .custom-icon {
    width: 52px; height: 52px; object-fit: contain; vertical-align: middle;
}

.about-value-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.about-value-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ---------- About: 发展历程 ---------- */
.section-about-timeline {
    padding: 80px 0;
    background: var(--bg-primary);
}

.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 11px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--gold-light), rgba(212,147,0,0.1));
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
    position: absolute;
    left: -40px;
    top: 6px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 3px solid var(--gold-light);
    z-index: 1;
    transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
    background: var(--gold-light);
    box-shadow: 0 0 16px var(--gold-glow);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}

.timeline-item:hover .timeline-content {
    border-color: rgba(212, 147, 0, 0.3);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.timeline-year {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    color: var(--gold-light);
    background: rgba(212, 147, 0, 0.1);
    padding: 3px 12px;
    border-radius: 20px;
    margin-bottom: 10px;
}

.timeline-content h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ---------- CTA Card（子页面底部CTA）---------- */
.section-cta {
    padding: 60px 0 100px;
    background: var(--bg-primary);
}

.cta-card {
    max-width: 720px;
    margin: 0 auto;
    padding: 48px 40px;
    text-align: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.cta-card:hover {
    border-color: rgba(212, 147, 0, 0.3);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
}

.cta-card h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.cta-card p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

/* ---------- Animations ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
}

.fade-in.visible {
    animation: pv-fade-up 0.6s ease forwards;
}

@keyframes pv-fade-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 22, 40, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border);
    }

    .nav.open {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-divider {
        display: none;
    }

    .software-grid {
        grid-template-columns: 1fr;
    }

    .courses-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr 1fr;
    }

    .contact-cards {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        flex-direction: column;
    }

    .footer-links {
        gap: 30px;
    }
    .detail-copy-btn {
        width: 100%;
        margin-bottom: 8px;
    }

    .spec-label {
        flex: 0 0 100px;
        font-size: 13px;
    }
    .spec-value {
        font-size: 13px;
    }
    .detail-breadcrumb {
        padding-top: 85px;
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
}

/* ========================================
   清新浅绿主题（MSteel 浅绿风格）— 硬编码覆盖
   ======================================== */

/* ── 亮色主题全局调整 ── */
[data-theme="msteel"] .header.scrolled {
    background: rgba(184, 217, 176, 0.95);
    border-bottom: 1px solid rgba(0,0,0,0.08);
}
[data-theme="msteel"] .hero-grid {
    background-image:
        linear-gradient(rgba(0,0,0,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,0,0,0.03) 1px, transparent 1px);
}
[data-theme="msteel"] .hero-glow { opacity: 0.08; }
[data-theme="msteel"] .hero-title {
    background: linear-gradient(180deg, #1a3a1a 0%, #2e5a2e 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
[data-theme="msteel"] .page-hero-content h1 {
    background: linear-gradient(180deg, #1a3a1a 0%, #2e5a2e 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
[data-theme="msteel"] .software-card-number {
    color: rgba(0, 0, 0, 0.03);
}
[data-theme="msteel"] .stat-divider { background: rgba(0,0,0,0.15); }
[data-theme="msteel"] .btn-primary { color: #fff; }

/* ── 导航 ── */
[data-theme="msteel"] .logo-icon { filter: drop-shadow(0 0 8px rgba(76,175,80,0.5)); }
[data-theme="msteel"] .nav-link:hover,
[data-theme="msteel"] .nav-link.active { background: rgba(56,142,60,0.08); }
[data-theme="msteel"] .hero-badge { border-color: rgba(56,142,60,0.3); background: rgba(56,142,60,0.05); }
[data-theme="msteel"] .badge-dot { animation-name: pulseMsteel; }

/* ── 按钮 ── */
[data-theme="msteel"] .btn-primary:hover { box-shadow: 0 6px 40px rgba(56,142,60,0.4); }
[data-theme="msteel"] .btn-outline:hover { background: rgba(56,142,60,0.05); }
[data-theme="msteel"] .btn-outline:hover,
[data-theme="msteel"] .btn-outline { border-color: rgba(56,142,60,0.3); color: #388e3c; }

/* ── 软件卡片 ── */
[data-theme="msteel"] .software-card:hover { border-color: rgba(56,142,60,0.2); }
[data-theme="msteel"] .card-arrow { background: rgba(56,142,60,0.1); }

/* ── 课程卡片 ── */
[data-theme="msteel"] .course-tag { background: rgba(56,142,60,0.1); }
[data-theme="msteel"] .course-duration { background: rgba(38,198,218,0.08); }

/* ── 特性/快捷入口 ── */
[data-theme="msteel"] .feature-card:hover { border-color: rgba(56,142,60,0.15); background: rgba(56,142,60,0.03); }
[data-theme="msteel"] .quick-link-card:hover { border-color: rgba(56,142,60,0.3); }

/* ── 下载模块 ── */
[data-theme="msteel"] .dl-item-note { background: rgba(56,142,60,0.08); border-color: rgba(56,142,60,0.2); }
[data-theme="msteel"] .dl-item-contact a,
[data-theme="msteel"] .dl-item-note { color: var(--gold-light); }
[data-theme="msteel"] .btn-dl-list { color: #fff; }

/* ── 联系方式 ── */
[data-theme="msteel"] .contact-card:hover { border-color: rgba(56,142,60,0.2); }
[data-theme="msteel"] .contact-card-icon { background: rgba(56,142,60,0.08); }
[data-theme="msteel"] .contact-value { color: #2e7d32; }

/* ── 新闻时间线 ── */
[data-theme="msteel"] .news-timeline::before {
    background: linear-gradient(180deg, rgba(56,142,60,0.3) 0%, rgba(38,198,218,0.15) 50%, rgba(56,142,60,0.05) 100%);
}
[data-theme="msteel"] .news-item:hover { border-color: rgba(56,142,60,0.18); }
[data-theme="msteel"] .news-item::before { box-shadow: 0 0 8px rgba(56,142,60,0.4); }
[data-theme="msteel"] .news-tag.publish { background: rgba(56,142,60,0.12); }

/* ── 案例卡片 ── */
[data-theme="msteel"] .case-card::before { background: radial-gradient(circle, rgba(56,142,60,0.06) 0%, transparent 70%); }
[data-theme="msteel"] .case-card:hover { border-color: rgba(56,142,60,0.2); }
[data-theme="msteel"] .case-card-tag { background: rgba(56,142,60,0.12); }
[data-theme="msteel"] .case-card-metrics { background: rgba(38,198,218,0.08); }

/* ── 合作方式 ── */
[data-theme="msteel"] .cooperation-card:hover { border-color: rgba(56,142,60,0.2); }
[data-theme="msteel"] .cooperation-card-features li::before { color: #4caf50; }

/* ── 浮动按钮 & 返回顶部 ── */
[data-theme="msteel"] .floating-trial:hover { box-shadow: 0 6px 35px rgba(56,142,60,0.5); }
[data-theme="msteel"] .floating-trial { color: #fff; }
[data-theme="msteel"] .back-to-top:hover { box-shadow: 0 4px 20px rgba(56,142,60,0.2); }

/* ── 详情页 ── */
[data-theme="msteel"] .detail-screenshot-item:hover { box-shadow: 0 6px 24px rgba(56,142,60,0.15); }
[data-theme="msteel"] .detail-badge { background: rgba(56,142,60,0.08); border-color: rgba(56,142,60,0.2); }
[data-theme="msteel"] .detail-features li:hover { border-color: rgba(56,142,60,0.2); }
[data-theme="msteel"] .detail-features li::before { color: #4caf50; }
[data-theme="msteel"] .btn-dl-detail { background: rgba(56,142,60,0.08); border-color: rgba(56,142,60,0.25); }
[data-theme="msteel"] .btn-dl-detail:hover { background: rgba(56,142,60,0.18); border-color: rgba(56,142,60,0.5); box-shadow: 0 0 16px rgba(56,142,60,0.2); }
[data-theme="msteel"] .btn-dl-note { background: rgba(56,142,60,0.08) !important; border-color: rgba(56,142,60,0.2) !important; }

/* ── 关于页面 ── */
[data-theme="msteel"] .about-stat-card:hover,
[data-theme="msteel"] .about-value-card:hover { border-color: rgba(56,142,60,0.3); }
[data-theme="msteel"] .about-stat-num { color: #2e7d32; }
[data-theme="msteel"] .timeline::before { background: linear-gradient(180deg, var(--gold-light), rgba(56,142,60,0.1)); }
[data-theme="msteel"] .timeline-item:hover .timeline-content { border-color: rgba(56,142,60,0.3); }
[data-theme="msteel"] .timeline-year { background: rgba(56,142,60,0.1); }
[data-theme="msteel"] .timeline-dot { border-color: #4caf50; }

/* ── CTA卡片 ── */
[data-theme="msteel"] .cta-card:hover { border-color: rgba(56,142,60,0.3); }

/* ── 页脚 ── */
[data-theme="msteel"] .footer-col h4 { color: #2e7d32; }
[data-theme="msteel"] .footer-toggle { color: #2e7d32; }
[data-theme="msteel"] .footer-toggle:hover { color: #43a047; }

/* ── 导航移动端 ── */
[data-theme="msteel"] .nav.open {
    background: rgba(232, 245, 233, 0.98);
    border-bottom: 1px solid rgba(0,0,0,0.08);
}

/* ── 徽章点动画 ── */
@keyframes pulseMsteel {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(76,175,80,0.4); }
    50% { opacity: 0.6; box-shadow: 0 0 0 10px rgba(76,175,80,0); }
}

/* ========================================
   清新自然主题 — 硬编码覆盖
   ======================================== */

/* ── 亮色主题全局 ── */
[data-theme="nature"] .header.scrolled {
    background: rgba(247, 250, 245, 0.96);
    border-bottom: 1px solid rgba(0,0,0,0.07);
}
[data-theme="nature"] .hero-grid {
    background-image:
        linear-gradient(rgba(0,0,0,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,0,0,0.025) 1px, transparent 1px);
}
[data-theme="nature"] .hero-glow {
    background: radial-gradient(ellipse at 50% 0%, rgba(67,160,71,0.08) 0%, rgba(66,165,245,0.04) 50%, transparent 70%);
    opacity: 0.5;
}
[data-theme="nature"] .hero-title {
    background: linear-gradient(180deg, #1a3a1a 0%, #2e5a2e 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
[data-theme="nature"] .page-hero-content h1 {
    background: linear-gradient(180deg, #1a3a1a 0%, #2e5a2e 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
[data-theme="nature"] .software-card-number {
    color: rgba(0, 0, 0, 0.025);
}
[data-theme="nature"] .stat-divider { background: rgba(0,0,0,0.12); }
[data-theme="nature"] .btn-primary { color: #fff; }

/* ── 导航 ── */
[data-theme="nature"] .logo-icon { filter: drop-shadow(0 0 8px rgba(67,160,71,0.4)); }
[data-theme="nature"] .nav-link:hover,
[data-theme="nature"] .nav-link.active { background: rgba(67,160,71,0.06); }
[data-theme="nature"] .hero-badge { border-color: rgba(67,160,71,0.25); background: rgba(67,160,71,0.04); }
[data-theme="nature"] .badge-dot { animation-name: pulseNature; }

/* ── 按钮 ── */
[data-theme="nature"] .btn-primary:hover { box-shadow: 0 6px 40px rgba(67,160,71,0.35); }
[data-theme="nature"] .btn-outline:hover { background: rgba(67,160,71,0.04); }
[data-theme="nature"] .btn-outline { border-color: rgba(67,160,71,0.28); color: #43a047; }

/* ── 软件卡片 ── */
[data-theme="nature"] .software-card:hover { border-color: rgba(67,160,71,0.18); }
[data-theme="nature"] .card-arrow { background: rgba(67,160,71,0.08); }

/* ── 课程卡片 ── */
[data-theme="nature"] .course-tag { background: rgba(67,160,71,0.08); }
[data-theme="nature"] .course-duration { background: rgba(66,165,245,0.06); }

/* ── 特性/快捷入口 ── */
[data-theme="nature"] .feature-card:hover { border-color: rgba(67,160,71,0.14); background: rgba(67,160,71,0.02); }
[data-theme="nature"] .quick-link-card:hover { border-color: rgba(67,160,71,0.25); }

/* ── 下载模块 ── */
[data-theme="nature"] .dl-item-note { background: rgba(67,160,71,0.06); border-color: rgba(67,160,71,0.18); }
[data-theme="nature"] .dl-item-note { color: #43a047; }
[data-theme="nature"] .dl-item-contact a { color: #43a047; }
[data-theme="nature"] .btn-dl-list { color: #fff; }

/* ── 联系方式 ── */
[data-theme="nature"] .contact-card:hover { border-color: rgba(67,160,71,0.18); }
[data-theme="nature"] .contact-card-icon { background: rgba(67,160,71,0.06); }
[data-theme="nature"] .contact-value { color: #2e7d32; }

/* ── 新闻时间线 ── */
[data-theme="nature"] .news-timeline::before {
    background: linear-gradient(180deg, rgba(67,160,71,0.25) 0%, rgba(66,165,245,0.12) 50%, rgba(67,160,71,0.04) 100%);
}
[data-theme="nature"] .news-item:hover { border-color: rgba(67,160,71,0.16); }
[data-theme="nature"] .news-item::before { box-shadow: 0 0 8px rgba(67,160,71,0.35); }
[data-theme="nature"] .news-tag.publish { background: rgba(67,160,71,0.1); }

/* ── 案例卡片 ── */
[data-theme="nature"] .case-card::before { background: radial-gradient(circle, rgba(67,160,71,0.05) 0%, transparent 70%); }
[data-theme="nature"] .case-card:hover { border-color: rgba(67,160,71,0.18); }
[data-theme="nature"] .case-card-tag { background: rgba(67,160,71,0.1); }
[data-theme="nature"] .case-card-metrics { background: rgba(66,165,245,0.06); }

/* ── 合作方式 ── */
[data-theme="nature"] .cooperation-card:hover { border-color: rgba(67,160,71,0.18); }
[data-theme="nature"] .cooperation-card-features li::before { color: #66bb6a; }

/* ── 浮动按钮 & 返回顶部 ── */
[data-theme="nature"] .floating-trial:hover { box-shadow: 0 6px 35px rgba(67,160,71,0.45); }
[data-theme="nature"] .floating-trial { color: #fff; }
[data-theme="nature"] .back-to-top:hover { box-shadow: 0 4px 20px rgba(67,160,71,0.18); }

/* ── 详情页 ── */
[data-theme="nature"] .detail-screenshot-item:hover { box-shadow: 0 6px 24px rgba(67,160,71,0.12); }
[data-theme="nature"] .detail-badge { background: rgba(67,160,71,0.06); border-color: rgba(67,160,71,0.18); }
[data-theme="nature"] .detail-features li:hover { border-color: rgba(67,160,71,0.18); }
[data-theme="nature"] .detail-features li::before { color: #66bb6a; }
[data-theme="nature"] .btn-dl-detail { background: rgba(67,160,71,0.06); border-color: rgba(67,160,71,0.2); }
[data-theme="nature"] .btn-dl-detail:hover { background: rgba(67,160,71,0.15); border-color: rgba(67,160,71,0.45); box-shadow: 0 0 16px rgba(67,160,71,0.15); }
[data-theme="nature"] .btn-dl-note { background: rgba(67,160,71,0.06) !important; border-color: rgba(67,160,71,0.18) !important; }

/* ── 关于页面 ── */
[data-theme="nature"] .about-stat-card:hover,
[data-theme="nature"] .about-value-card:hover { border-color: rgba(67,160,71,0.25); }
[data-theme="nature"] .about-stat-num { color: #2e7d32; }
[data-theme="nature"] .timeline::before { background: linear-gradient(180deg, #81c784, rgba(67,160,71,0.1)); }
[data-theme="nature"] .timeline-item:hover .timeline-content { border-color: rgba(67,160,71,0.25); }
[data-theme="nature"] .timeline-year { background: rgba(67,160,71,0.08); }
[data-theme="nature"] .timeline-dot { border-color: #66bb6a; }

/* ── CTA卡片 ── */
[data-theme="nature"] .cta-card:hover { border-color: rgba(67,160,71,0.25); }

/* ── 页脚 ── */
[data-theme="nature"] .footer-col h4 { color: #2e7d32; }
[data-theme="nature"] .footer-toggle { color: #388e3c; }
[data-theme="nature"] .footer-toggle:hover { color: #4caf50; }

/* ── 导航移动端 ── */
[data-theme="nature"] .nav.open {
    background: rgba(247, 250, 245, 0.98);
    border-bottom: 1px solid rgba(0,0,0,0.07);
}

/* ── 清新脉冲动画 ── */
@keyframes pulseNature {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(67,160,71,0.35); }
    50% { opacity: 0.5; box-shadow: 0 0 0 10px rgba(67,160,71,0); }
}