/* ===== 字体 & 基础变量 ===== */
:root {
    --bg: #f5f7fb;
    --bg-soft: #eef2f9;
    --surface: rgba(255, 255, 255, 0.72);
    --surface-solid: #ffffff;
    --text: #0f1729;
    --text-soft: #4a5568;
    --text-muted: #8b95a7;
    --border: rgba(99, 102, 241, 0.14);
    --border-soft: rgba(15, 23, 41, 0.06);
    --accent: #6366f1;
    --accent-2: #8b5cf6;
    --accent-3: #06b6d4;
    --accent-glow: rgba(99, 102, 241, 0.45);
    --shadow-sm: 0 2px 12px rgba(15, 23, 41, 0.04);
    --shadow-md: 0 8px 30px rgba(99, 102, 241, 0.10);
    --shadow-lg: 0 20px 60px rgba(99, 102, 241, 0.16);
    --radius: 18px;
    --radius-sm: 12px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.65;
    color: var(--text);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* 渐变网格背景 - AI 时代标志性氛围 */
    background-image:
        radial-gradient(at 12% 18%, rgba(99, 102, 241, 0.10) 0px, transparent 50%),
        radial-gradient(at 85% 12%, rgba(139, 92, 246, 0.08) 0px, transparent 50%),
        radial-gradient(at 75% 85%, rgba(6, 182, 212, 0.07) 0px, transparent 50%),
        radial-gradient(at 20% 80%, rgba(99, 102, 241, 0.06) 0px, transparent 50%);
    background-attachment: fixed;
    min-height: 100vh;
}

h1, h2, h3, .logo {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    letter-spacing: -0.02em;
}

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

/* ===== 导航栏 - 毛玻璃 ===== */
nav {
    background: var(--surface);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--border-soft);
    padding: 0.9rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav .container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    column-gap: 1rem;
}
nav .container > .logo {
    justify-self: start;
    flex-shrink: 0;
}
nav .container > .nav-links {
    justify-self: center;
}

.logo {
    color: var(--text);
    font-size: 1.45rem;
    font-weight: 700;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    filter: drop-shadow(0 4px 12px var(--accent-glow));
    transition: transform 0.3s ease;
}

.logo:hover .logo-icon {
    transform: rotate(-6deg) scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-soft);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.25s ease;
    position: relative;
}

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

.nav-links .active {
    color: var(--accent);
    font-weight: 600;
}

.nav-links .active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.login-btn {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: #fff;
    padding: 0.55rem 1.4rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.92rem;
    transition: all 0.25s ease;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 78vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 3rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.18) 0%, transparent 60%);
    filter: blur(40px);
    z-index: 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--surface);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    padding: 0.4rem 1rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 1.8rem;
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow-sm);
}

.hero-badge .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent-3);
    box-shadow: 0 0 8px var(--accent-3);
}

.hero h1 {
    font-size: 3.8rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.8rem;
    position: relative;
    z-index: 1;
    line-height: 1.1;
}

.hero h1 span {
    background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent-3) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.18rem;
    color: var(--text-soft);
    margin-bottom: 2.2rem;
    position: relative;
    z-index: 1;
    font-weight: 400;
}

.hero-btn {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: #fff;
    padding: 1rem 2.4rem;
    border-radius: 14px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 10px 30px var(--accent-glow);
}

.hero-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 40px var(--accent-glow);
}

.hero-btn i {
    transition: transform 0.3s ease;
}

.hero-btn:hover i {
    transform: translateY(3px);
}

/* ===== 产品展示 ===== */
.products {
    padding: 5rem 0;
    background: transparent;
}

.section-title {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-title h2 {
    font-size: 2.6rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.6rem;
}

.section-title p {
    font-size: 1.05rem;
    color: var(--text-muted);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.8rem;
}

.product-card {
    background: var(--surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid var(--border-soft);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
    opacity: 0;
    transition: opacity 0.35s ease;
}

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

.product-card:hover::before {
    opacity: 1;
}

.product-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.4rem;
    font-size: 1.4rem;
    color: #fff;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    box-shadow: 0 8px 20px var(--accent-glow);
    transition: transform 0.35s ease;
}

.product-card:hover .product-icon {
    transform: scale(1.08) rotate(-4deg);
}

.product-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.product-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.product-card .tag {
    display: inline-block;
    background: rgba(99, 102, 241, 0.10);
    color: var(--accent);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.product-card .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: gap 0.25s ease;
}

.product-card .btn:hover {
    gap: 0.6rem;
}

/* ===== 关于开发者 ===== */
.about-dev {
    padding: 5rem 0;
    text-align: center;
}

.dev-avatar {
    width: 110px;
    height: 110px;
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    font-size: 2.2rem;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    box-shadow: 0 12px 36px var(--accent-glow);
}

.about-dev h2 {
    font-size: 2.3rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 1.5rem;
}

.about-dev p {
    font-size: 1.05rem;
    color: var(--text-soft);
    max-width: 620px;
    margin: 0 auto 2rem;
    line-height: 1.85;
}

.dev-tags {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.dev-tags span {
    background: var(--surface-solid);
    border: 1px solid var(--border);
    color: var(--accent);
    padding: 0.5rem 1.1rem;
    border-radius: 12px;
    font-size: 0.88rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

/* ===== 页脚 ===== */
footer {
    background: var(--surface);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-soft);
    color: var(--text-muted);
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

footer p {
    font-size: 0.9rem;
}

/* ===== 联系渠道 ===== */
.contact-channels {
    text-align: center;
    margin-top: 2.5rem;
}

.channels-title {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 0.98rem;
}

.channels-grid {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    flex-wrap: wrap;
}

.channel {
    text-align: center;
}

.channel i {
    font-size: 1.6rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
    display: block;
}

.channel p {
    color: var(--text-soft);
    font-size: 0.92rem;
}

/* ===== 内页通用 ===== */
.page-content {
    min-height: calc(100vh - 100px);
    padding: 5rem 0;
}

.page-content h1 {
    font-size: 2.6rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 1.5rem;
    text-align: center;
}

.page-content h2 {
    text-align: center;
    margin: 2.5rem 0 1rem;
    color: var(--text);
    font-size: 1.6rem;
}

.page-content > .container > p {
    font-size: 1.05rem;
    color: var(--text-soft);
    max-width: 720px;
    margin: 0 auto 1.5rem;
    text-align: center;
    line-height: 1.85;
}

.feature-list {
    max-width: 620px;
    margin: 2rem auto;
    list-style: none;
}

.feature-list li {
    padding: 1.1rem 1.3rem;
    background: var(--surface);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-sm);
    margin-bottom: 0.9rem;
    color: var(--text-soft);
    border: 1px solid var(--border-soft);
    transition: all 0.25s ease;
}

.feature-list li:hover {
    border-color: var(--border);
    transform: translateX(4px);
}

/* ===== 联系表单 ===== */
.contact-form {
    max-width: 560px;
    margin: 2rem auto;
    background: var(--surface);
    backdrop-filter: blur(20px);
    padding: 2.2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 1.3rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text);
    font-size: 0.92rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
    font-size: 0.98rem;
    font-family: inherit;
    background: rgba(255, 255, 255, 0.6);
    color: var(--text);
    transition: all 0.25s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.12);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: #fff;
    padding: 0.95rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px var(--accent-glow);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px var(--accent-glow);
}

/* ===== 登录页 ===== */
.login-container {
    max-width: 420px;
    margin: 4rem auto;
    background: var(--surface);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 2.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow-lg);
}

.login-container h2 {
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.4rem;
    text-align: center;
}

.login-container .subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.login-container p {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-muted);
    font-size: 0.92rem;
}

.login-container p a,
.toggle-btn {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-family: inherit;
}

.toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.92rem;
}

.login-container p a:hover,
.toggle-btn:hover {
    text-decoration: underline;
}

/* ===== 关于页 ===== */
.about-hero {
    text-align: center;
    padding: 5rem 2rem 3rem;
    position: relative;
    overflow: hidden;
}

.about-hero::before {
    content: '';
    position: absolute;
    top: -30%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.14) 0%, transparent 60%);
    filter: blur(40px);
    z-index: 0;
}

.about-hero .dev-avatar {
    position: relative;
    z-index: 1;
}

.about-hero h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 1.2rem;
    position: relative;
    z-index: 1;
}

.about-hero p {
    font-size: 1.08rem;
    color: var(--text-soft);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.85;
    position: relative;
    z-index: 1;
}

.about-section {
    padding: 3.5rem 0;
}

.about-section-title {
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--text);
    text-align: center;
    margin-bottom: 2.5rem;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.8rem;
}

.value-card {
    background: var(--surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow-sm);
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.value-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.3rem;
    font-size: 1.3rem;
    color: #fff;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    box-shadow: 0 8px 20px var(--accent-glow);
}

.value-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.value-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.9rem;
    max-width: 720px;
    margin: 0 auto;
}

.tech-tags span {
    padding: 0.6rem 1.4rem;
    background: var(--surface);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 30px;
    font-size: 0.92rem;
    font-weight: 500;
    cursor: default;
    transition: all 0.25s ease;
    box-shadow: var(--shadow-sm);
}

.tech-tags span:hover {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: #fff;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--accent-glow);
}

.about-cta {
    text-align: center;
    padding: 4.5rem 2rem;
    margin: 2rem auto;
    max-width: 900px;
    background: var(--surface);
    backdrop-filter: blur(20px);
    border-radius: var(--radius);
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.about-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
}

.about-cta h2 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent-3) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.8rem;
}

.about-cta p {
    font-size: 1.05rem;
    color: var(--text-soft);
}

/* ===== 404 页 ===== */
.not-found {
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 3rem 2rem;
    position: relative;
    overflow: hidden;
}

.not-found::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 60%);
    filter: blur(40px);
    z-index: 0;
}

.not-found-code {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 9rem;
    font-weight: 700;
    line-height: 1;
    background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent-3) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.not-found h1 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.8rem;
    position: relative;
    z-index: 1;
}

.not-found p {
    font-size: 1.05rem;
    color: var(--text-soft);
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.not-found .hero-btn {
    position: relative;
    z-index: 1;
}

/* ===== 登录页（微信扫码 + 邮箱） ===== */
.login-wrap {
    min-height: 78vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem;
}

.auth-tabs {
    display: flex;
    gap: 0.5rem;
    background: var(--bg-soft);
    border-radius: var(--radius-sm);
    padding: 0.35rem;
    margin-bottom: 1.8rem;
}

.auth-tab {
    flex: 1;
    padding: 0.65rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.92rem;
    font-weight: 600;
    border-radius: 9px;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.auth-tab.active {
    background: var(--surface-solid);
    color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.auth-panel {
    display: none;
    animation: fadeUp 0.3s ease;
}

.auth-panel.active {
    display: block;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 二维码区域 */
.qr-box {
    width: 220px;
    height: 220px;
    margin: 0.5rem auto 1.2rem;
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-soft);
    background: #fff;
    padding: 14px;
    box-shadow: var(--shadow-sm);
}

.qr-canvas {
    width: 100%;
    height: 100%;
    overflow: hidden;
    line-height: 0;
}

.qr-canvas svg {
    width: 100%;
    height: 100%;
    display: block;
}

/* 扫码状态遮罩 */
.qr-mask {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(6px);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    color: var(--accent);
}

.qr-mask.show {
    display: flex;
}

.qr-mask i {
    font-size: 2.2rem;
}

.qr-mask span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
}

.qr-tip {
    text-align: center;
    color: var(--text-soft);
    font-size: 0.92rem;
    margin-bottom: 1.3rem;
}

.qr-tip strong {
    color: #07c160;
}

.qr-action-btn {
    width: 100%;
    background: linear-gradient(135deg, #07c160 0%, #06ad56 100%);
    color: #fff;
    padding: 0.85rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.98rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 8px 20px rgba(7, 193, 96, 0.35);
}

.qr-action-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(7, 193, 96, 0.45);
}

.qr-action-btn:disabled {
    opacity: 0.7;
    cursor: default;
}

.demo-note {
    margin-top: 1.2rem;
    padding: 0.7rem 0.9rem;
    background: rgba(99, 102, 241, 0.06);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.82rem;
    text-align: left;
    line-height: 1.5;
}

.demo-note i {
    color: var(--accent);
    margin-right: 0.3rem;
}

/* 邮箱表单切换 */
.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-switch {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-muted);
    font-size: 0.92rem;
}

/* 提示信息 */
.auth-message {
    margin-top: 1.2rem;
    padding: 0;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    text-align: center;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.auth-message.show {
    padding: 0.7rem 1rem;
    max-height: 60px;
}

.auth-message.info {
    background: rgba(99, 102, 241, 0.08);
    color: var(--accent);
}

.auth-message.success {
    background: rgba(7, 193, 96, 0.1);
    color: #06ad56;
}

.auth-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
}

/* ===== 导航栏用户菜单 ===== */
.auth-nav {
    display: flex;
    align-items: center;
}

.user-menu {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.7rem 0.35rem 0.4rem;
    border-radius: 30px;
    cursor: pointer;
    transition: background 0.25s ease;
    outline: none;
}

.user-menu:hover,
.user-menu:focus {
    background: var(--bg-soft);
}

.user-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.85rem;
    font-family: 'Space Grotesk', sans-serif;
    flex-shrink: 0;
}

.user-avatar.lg {
    width: 42px;
    height: 42px;
    font-size: 1.1rem;
}

.user-name {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    max-width: 90px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-caret {
    font-size: 0.7rem;
    color: var(--text-muted);
    transition: transform 0.25s ease;
}

.user-menu:hover .user-caret,
.user-menu:focus .user-caret {
    transform: rotate(180deg);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 220px;
    background: var(--surface-solid);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 0.8rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.25s ease;
    z-index: 100;
}

.user-menu:hover .user-dropdown,
.user-menu:focus .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown-header {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.5rem;
}

.ud-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text);
}

.ud-email {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.user-dropdown-divider {
    height: 1px;
    background: var(--border-soft);
    margin: 0.6rem 0;
}

.user-dropdown-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 0.7rem;
    border: none;
    background: none;
    color: var(--text-soft);
    font-family: inherit;
    font-size: 0.9rem;
    border-radius: 9px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.user-dropdown-item:hover {
    background: var(--bg-soft);
    color: var(--text);
}

.user-dropdown-item i {
    width: 16px;
    color: var(--text-muted);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .nav-links {
        gap: 1.2rem;
    }

    .hero h1 {
        font-size: 2.3rem;
    }

    .hero p {
        font-size: 1.05rem;
    }

    .section-title h2 {
        font-size: 1.9rem;
    }

    .page-content h1 {
        font-size: 1.9rem;
    }

    .user-name {
        display: none;
    }

    .login-container {
        padding: 1.8rem 1.5rem;
    }

    .qr-box {
        width: 180px;
        height: 180px;
    }
}
/* ========== 敬请期待卡片（未上线工具） ========== */
.coming-soon {
    opacity: .62;
    filter: grayscale(45%);
    cursor: not-allowed;
    user-select: none;
}
.coming-soon .product-icon {
    background: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%) !important;
    box-shadow: 0 4px 12px rgba(148, 163, 184, .25) !important;
}
.coming-soon h3 {
    color: #64748b;
    letter-spacing: .08em;
    font-weight: 600;
}
.coming-soon .btn {
    background: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%) !important;
    color: #fff !important;
    pointer-events: none !important;
    cursor: not-allowed !important;
    box-shadow: none !important;
    opacity: .9;
}
.coming-soon .btn:hover,
.coming-soon .btn:active {
    transform: none !important;
    box-shadow: none !important;
}

/* ========== 联系页：单一邮箱 ========== */
.channels-grid-single {
    grid-template-columns: 1fr !important;
    max-width: 460px;
    margin: 0 auto;
}
.channel-email {
    cursor: pointer;
    transition: all .2s ease;
    border-color: #e0e7ff;
}
.channel-email:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 28px rgba(99, 102, 241, .12);
    border-color: #c7d2fe;
}
.email-link {
    color: #4f46e5 !important;
    text-decoration: none !important;
    font-weight: 600;
    transition: color .15s;
}
.email-link:hover {
    color: #4338ca !important;
    text-decoration: underline !important;
}