/* ============================================
   三众漫剧生产平台与系统 · 产品小站样式
   主题：AIGC 漫剧创作（紫蓝渐变 + 深色 Hero）
   ============================================ */
:root {
    --primary-color: #6d28d9;
    --primary-light: #8b5cf6;
    --primary-dark: #5b21b6;
    --accent-color: #4f46e5;
    --gradient: linear-gradient(135deg, #6d28d9 0%, #4f46e5 100%);
    --gradient-light: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
    --dark-bg: #0f0a1e;
    --dark-bg-2: #17102b;
    --text-dark: #1e1b2e;
    --text-gray: #5b5670;
    --text-light: #a29db8;
    --bg-light: #ffffff;
    --bg-alt: #f7f5fc;
    --border-color: #e6e1f2;
    --shadow: 0 4px 12px rgba(74, 42, 150, 0.08);
    --shadow-hover: 0 12px 32px rgba(74, 42, 150, 0.16);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background: var(--bg-light);
}

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

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

ul {
    list-style: none;
}

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

/* ---------- 头部导航 ---------- */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 10, 30, 0.92);
    backdrop-filter: blur(12px);
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.25);
    transition: box-shadow 0.3s ease;
}

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

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

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.logo-text h1 {
    font-size: 19px;
    color: #fff;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo-text h1 span {
    background: linear-gradient(90deg, #a78bfa, #818cf8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav ul {
    display: flex;
    gap: 28px;
}

nav a {
    color: rgba(255, 255, 255, 0.82);
    font-size: 15px;
    font-weight: 500;
    padding: 6px 0;
    position: relative;
    transition: color 0.25s;
}

nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background: var(--gradient-light);
    transition: width 0.25s;
}

nav a:hover {
    color: #fff;
}

nav a:hover::after {
    width: 100%;
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--gradient);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    padding: 9px 20px;
    border-radius: 22px;
    transition: transform 0.25s, box-shadow 0.25s;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(109, 40, 217, 0.45);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 26px;
    cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 640px;
    display: flex;
    align-items: center;
    padding: 140px 0 100px;
    background: var(--dark-bg) url("images/banner-1.jpg") center/cover no-repeat;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, rgba(15, 10, 30, 0.94) 0%, rgba(23, 16, 43, 0.82) 45%, rgba(15, 10, 30, 0.55) 100%);
}

.hero-content {
    position: relative;
    max-width: 780px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #c4b5fd;
    border: 1px solid rgba(167, 139, 250, 0.45);
    background: rgba(109, 40, 217, 0.22);
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 26px;
    letter-spacing: 1px;
}

.hero h2 {
    font-size: 46px;
    line-height: 1.25;
    color: #fff;
    font-weight: 800;
    margin-bottom: 22px;
}

.hero h2 span {
    background: linear-gradient(90deg, #a78bfa 0%, #818cf8 60%, #67e8f9 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.78);
    margin-bottom: 34px;
    max-width: 640px;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 38px;
}

.hero-feature {
    font-size: 13.5px;
    color: rgba(255, 255, 255, 0.88);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.14);
    padding: 8px 16px;
    border-radius: 8px;
    backdrop-filter: blur(4px);
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    padding: 14px 36px;
    border-radius: 30px;
    transition: transform 0.25s, box-shadow 0.25s;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(109, 40, 217, 0.5);
}

.cta-button.secondary {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.35);
    color: #fff;
}

.cta-button.secondary:hover {
    background: rgba(255, 255, 255, 0.18);
    box-shadow: none;
}

/* ---------- 通用 Section ---------- */
.section {
    padding: 90px 0;
}

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

.section-title {
    text-align: center;
    max-width: 820px;
    margin: 0 auto 60px;
}

.section-title .kicker {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--primary-light);
    margin-bottom: 12px;
}

.section-title h2 {
    font-size: 34px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-title p {
    font-size: 16px;
    color: var(--text-gray);
}

/* ---------- 生产流程 ---------- */
.flow-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 18px;
    counter-reset: flow;
}

.flow-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 28px 18px 24px;
    text-align: center;
    transition: transform 0.25s, box-shadow 0.25s;
}

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

.flow-card::before {
    counter-increment: flow;
    content: "0" counter(flow);
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    padding: 4px 14px;
    border-radius: 14px;
    letter-spacing: 1px;
}

.flow-icon {
    font-size: 34px;
    margin: 6px 0 14px;
}

.flow-card h3 {
    font-size: 16.5px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.flow-card p {
    font-size: 13.5px;
    color: var(--text-gray);
    line-height: 1.65;
}

/* ---------- 核心功能 ---------- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px 28px;
    transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(139, 92, 246, 0.4);
}

.feature-icon {
    width: 54px;
    height: 54px;
    border-radius: 13px;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.14), rgba(99, 102, 241, 0.14));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin-bottom: 18px;
}

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

.feature-card p {
    font-size: 14px;
    color: var(--text-gray);
}

/* ---------- 平台实景 ---------- */
.showcase {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 22px;
}

.showcase-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    min-height: 300px;
    background: var(--dark-bg-2);
}

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

.showcase-item:hover img {
    transform: scale(1.04);
}

.showcase-cap {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 46px 24px 20px;
    background: linear-gradient(transparent, rgba(10, 6, 22, 0.88));
    color: #fff;
}

.showcase-cap h3 {
    font-size: 17px;
    margin-bottom: 4px;
}

.showcase-cap p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.72);
}

.showcase-side {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.showcase-side .showcase-item {
    flex: 1;
    min-height: 0;
}

/* ---------- 系统优势 ---------- */
.advantages-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-card {
    background: #fff;
    border-radius: 16px;
    padding: 30px 28px;
    border-top: 4px solid var(--primary-light);
    box-shadow: var(--shadow);
    transition: transform 0.25s, box-shadow 0.25s;
}

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

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

.advantage-card p {
    font-size: 14px;
    color: var(--text-gray);
    margin-bottom: 16px;
}

.advantage-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.advantage-keywords span {
    font-size: 12px;
    color: var(--primary-dark);
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.22);
    padding: 4px 12px;
    border-radius: 12px;
}

/* ---------- 应用场景 Tabs ---------- */
.solutions-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 36px;
}

.tab-btn {
    background: #fff;
    border: 1px solid var(--border-color);
    color: var(--text-gray);
    font-size: 15px;
    font-weight: 600;
    padding: 11px 26px;
    border-radius: 24px;
    cursor: pointer;
    transition: all 0.25s;
}

.tab-btn:hover {
    color: var(--primary-dark);
    border-color: rgba(139, 92, 246, 0.45);
}

.tab-btn.active {
    background: var(--gradient);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 6px 18px rgba(109, 40, 217, 0.35);
}

.tab-pane {
    display: none;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 38px 36px;
    animation: fadeIn 0.35s ease;
}

.tab-pane.active {
    display: block;
}

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

.tab-pane h3 {
    font-size: 21px;
    font-weight: 700;
    margin-bottom: 12px;
}

.tab-pane > p {
    font-size: 14.5px;
    color: var(--text-gray);
    margin-bottom: 26px;
    max-width: 900px;
}

.solution-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.solution-feature {
    display: flex;
    gap: 12px;
    background: var(--bg-alt);
    border-radius: 12px;
    padding: 18px 16px;
}

.solution-feature-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.solution-feature-content h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 4px;
}

.solution-feature-content p {
    font-size: 13px;
    color: var(--text-gray);
}

/* ---------- OEM 贴牌 ---------- */
.oem-band {
    background: var(--dark-bg);
    position: relative;
    overflow: hidden;
}

.oem-band::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(600px 300px at 85% 20%, rgba(109, 40, 217, 0.35), transparent 65%),
        radial-gradient(500px 260px at 10% 85%, rgba(79, 70, 229, 0.28), transparent 65%);
}

.oem-wrap {
    position: relative;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 50px;
    align-items: center;
}

.oem-intro .kicker {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 3px;
    color: #a78bfa;
    margin-bottom: 12px;
}

.oem-intro h2 {
    font-size: 32px;
    color: #fff;
    font-weight: 800;
    margin-bottom: 16px;
}

.oem-intro p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.72);
    margin-bottom: 26px;
}

.oem-points {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.oem-point {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 12px;
    padding: 20px 18px;
}

.oem-point h4 {
    font-size: 15.5px;
    color: #fff;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.oem-point p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.65);
}

/* ---------- 联系我们 ---------- */
.contact-form-section {
    background: var(--bg-alt);
}

.towlan {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 26px;
    align-items: stretch;
}

.form-container {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 38px 36px;
    box-shadow: var(--shadow);
}

.form-title {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 44px;
}

.form-title h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 12px;
}

.form-title p {
    font-size: 15px;
    color: var(--text-gray);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
}

.form-group label.required::after {
    content: " *";
    color: #e11d48;
}

.form-group input,
.form-group textarea {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 14px;
    font-family: inherit;
    color: var(--text-dark);
    background: var(--bg-alt);
    transition: border-color 0.25s, box-shadow 0.25s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-light);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.form-group textarea {
    min-height: 110px;
    resize: vertical;
}

.form-group input.error,
.form-group textarea.error {
    border-color: #e11d48;
    background: #fff5f6;
}

.submit-btn {
    width: 100%;
    background: var(--gradient);
    color: #fff;
    border: none;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 2px;
    padding: 14px;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.25s, box-shadow 0.25s;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(109, 40, 217, 0.4);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.form-success {
    display: none;
    text-align: center;
    padding: 30px 10px;
}

.form-success.show {
    display: block;
}

.form-success h3 {
    font-size: 22px;
    color: var(--primary-dark);
    margin-bottom: 12px;
}

.form-success p {
    font-size: 14.5px;
    color: var(--text-gray);
    margin-bottom: 8px;
}

.form-success a {
    color: var(--primary-dark);
    font-weight: 700;
}

.lxwm {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px 30px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.lxwm > div {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.lxwm span {
    font-size: 24px;
    flex-shrink: 0;
}

.lxwm h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 3px;
}

.lxwm p {
    font-size: 13.5px;
    color: var(--text-gray);
}

.lxwm p a {
    color: var(--primary-dark);
    font-weight: 600;
}

.lxwm .tc {
    display: block;
    text-align: center;
    border-top: 1px dashed var(--border-color);
    padding-top: 20px;
    margin-top: 4px;
}

.lxwm .tc img {
    margin: 0 auto 10px;
    border-radius: 8px;
}

/* ---------- 页脚 ---------- */
footer {
    background: var(--dark-bg);
    color: rgba(255, 255, 255, 0.72);
    padding: 64px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.4fr 1fr 0.9fr 1fr;
    gap: 40px;
    padding-bottom: 44px;
}

.footer-column h3 {
    font-size: 17px;
    color: #fff;
    margin-bottom: 16px;
}

.footer-column p {
    font-size: 13.5px;
    margin-bottom: 9px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.72);
    transition: color 0.2s;
}

.footer-column a:hover {
    color: #a78bfa;
}

.footer-links li {
    margin-bottom: 9px;
}

.footer-links a {
    font-size: 13.5px;
}

.copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 22px 0 18px;
    text-align: center;
}

.copyright p {
    font-size: 13px;
    margin-bottom: 12px;
}

.copyright p a {
    color: rgba(255, 255, 255, 0.85);
}

.seo-keywords {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 6px;
    padding: 0 20px 20px;
}

.seo-keywords span {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.45);
}

.seo-keywords span::after {
    content: "·";
    margin-left: 6px;
    color: rgba(255, 255, 255, 0.25);
}

.seo-keywords span:last-child::after {
    content: "";
}

/* ---------- 动画 ---------- */
.feature-card, .flow-card, .advantage-card, .showcase-item, .oem-point {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .hero h2 {
        font-size: 38px;
    }
    .flow-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 26px 18px;
    }
    .features-grid,
    .advantages-container {
        grid-template-columns: repeat(2, 1fr);
    }
    .solution-features {
        grid-template-columns: repeat(2, 1fr);
    }
    .oem-wrap {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    nav {
        position: fixed;
        top: 68px;
        left: 0;
        right: 0;
        background: rgba(15, 10, 30, 0.98);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease;
    }
    nav ul {
        flex-direction: column;
        gap: 0;
        padding: 10px 20px;
    }
    nav ul li {
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    nav a {
        display: block;
        padding: 13px 0;
    }
    nav a::after {
        display: none;
    }
    nav.active {
        max-height: 420px;
    }
    .nav-cta {
        display: none;
    }
    .hero {
        min-height: 0;
        padding: 120px 0 80px;
    }
    .hero h2 {
        font-size: 30px;
    }
    .hero p {
        font-size: 15px;
    }
    .section {
        padding: 64px 0;
    }
    .section-title {
        margin-bottom: 42px;
    }
    .section-title h2 {
        font-size: 26px;
    }
    .flow-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .features-grid,
    .advantages-container,
    .solution-features {
        grid-template-columns: 1fr;
    }
    .showcase {
        grid-template-columns: 1fr;
    }
    .showcase-item {
        min-height: 220px;
    }
    .towlan {
        grid-template-columns: 1fr;
    }
    .form-container,
    .tab-pane {
        padding: 26px 20px;
    }
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .oem-points {
        grid-template-columns: 1fr;
    }
    .footer-content {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .cta-buttons .cta-button {
        width: 100%;
        justify-content: center;
    }
}