/* ==========================================================================
   创学啦文化传媒 - 全站样式表
   设计风格：现代渐变 + 卡片化 + 微动效
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
    /* 主色：靛紫渐变系 */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #ec4899;
    --color-accent: #0ea5e9;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    --gradient-soft: linear-gradient(135deg, #eef2ff 0%, #faf5ff 100%);
    --gradient-dark: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);

    /* 中性色 */
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-muted: #94a3b8;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-border: #e2e8f0;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);
    --shadow-xl: 0 24px 48px rgba(99, 102, 241, 0.18);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-full: 999px;

    /* 间距 */
    --container: 1200px;
    --header-h: 76px;

    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 通用按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: var(--radius-full);
    font-size: 15px;
    font-weight: 600;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    line-height: 1.2;
}

.btn--primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.35);
}
.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(99, 102, 241, 0.45);
}

.btn--ghost {
    background: #fff;
    color: var(--color-text);
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}
.btn--ghost:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn--light {
    background: #fff;
    color: var(--color-primary-dark);
}
.btn--light:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--outline-light {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
}
.btn--outline-light:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #fff;
}

.btn--lg {
    padding: 15px 32px;
    font-size: 16px;
}

/* ---------- 渐变文字 ---------- */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

/* ---------- 顶部公告栏 ---------- */
.top-bar {
    background: var(--gradient-dark);
    color: rgba(255, 255, 255, 0.9);
    font-size: 13px;
    padding: 8px 0;
}
.top-bar__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}
.top-bar__contact a:hover { color: #fff; }
.top-bar .divider {
    margin: 0 12px;
    opacity: 0.4;
}

/* ---------- 头部 / 导航 ---------- */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}
.header.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}
.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
}
.logo__icon {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 12px;
    font-size: 20px;
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.35);
}
.logo__text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}
.logo__name {
    font-size: 18px;
    color: var(--color-text);
}
.logo__sub {
    font-size: 10px;
    letter-spacing: 1.5px;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* 导航 */
.nav {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav__link {
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-light);
    position: relative;
}
.nav__link:hover {
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.08);
}
.nav__link.active {
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.1);
}
.nav__cta {
    margin-left: 12px;
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   首屏 Hero
   ========================================================================== */
.hero {
    position: relative;
    padding: 80px 0 100px;
    background: var(--gradient-soft);
    overflow: hidden;
}
.hero__bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}
.hero__shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 12s ease-in-out infinite;
}
.hero__shape--1 {
    width: 480px; height: 480px;
    background: #818cf8;
    top: -120px; right: -100px;
}
.hero__shape--2 {
    width: 380px; height: 380px;
    background: #f472b6;
    bottom: -80px; left: -80px;
    animation-delay: -4s;
}
.hero__shape--3 {
    width: 320px; height: 320px;
    background: #38bdf8;
    top: 40%; left: 45%;
    animation-delay: -8s;
}
@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(40px, -40px) scale(1.05); }
    66% { transform: translate(-30px, 30px) scale(0.95); }
}

.hero__inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero__title {
    font-size: clamp(38px, 5.5vw, 64px);
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

.hero__desc {
    font-size: 18px;
    color: var(--color-text-light);
    max-width: 540px;
    margin-bottom: 36px;
}

.hero__actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 56px;
}

.hero__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    padding-top: 32px;
    border-top: 1px solid rgba(99, 102, 241, 0.15);
}
.stat {
    display: flex;
    flex-direction: column;
}
.stat__num {
    font-size: 34px;
    font-weight: 800;
    color: var(--color-primary-dark);
    line-height: 1;
    display: inline-block;
}
.stat__plus {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    margin-left: 2px;
}
.stat__label {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: 6px;
}

/* Hero 视觉区 */
.hero__visual {
    position: relative;
    height: 480px;
}
.hero__card--main {
    position: relative;
    width: 100%;
    height: 100%;
}
.hero__orb {
    position: absolute;
    inset: 20% 10%;
    background: var(--gradient-primary);
    border-radius: 50%;
    filter: blur(2px);
    opacity: 0.85;
    animation: pulse 4s ease-in-out infinite;
    box-shadow: 0 30px 80px rgba(99, 102, 241, 0.4);
}
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}
.float-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.6);
    animation: bob 5s ease-in-out infinite;
    z-index: 2;
}
.float-card strong {
    display: block;
    font-size: 15px;
    color: var(--color-text);
}
.float-card small {
    font-size: 12px;
    color: var(--color-text-muted);
}
.float-card__icon {
    font-size: 28px;
}
.float-card--design { top: 8%; left: -20px; animation-delay: 0s; }
.float-card--dev    { top: 42%; right: -30px; animation-delay: -1.5s; }
.float-card--event  { bottom: 8%; left: 10%; animation-delay: -3s; }
@keyframes bob {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-14px); }
}

.hero__scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 26px;
    height: 42px;
    border: 2px solid var(--color-primary);
    border-radius: 14px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
    z-index: 2;
}
.hero__scroll span {
    width: 4px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: scrollDot 1.8s infinite;
}
@keyframes scrollDot {
    0%   { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(14px); opacity: 0; }
}

/* ==========================================================================
   通用区块
   ========================================================================== */
.section {
    padding: 96px 0;
}
.section__head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 64px;
}
.section__tag {
    display: inline-block;
    padding: 5px 14px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}
.section__title {
    font-size: clamp(28px, 3.5vw, 42px);
    font-weight: 800;
    letter-spacing: -0.01em;
    margin-bottom: 16px;
    line-height: 1.2;
}
.section__desc {
    font-size: 17px;
    color: var(--color-text-light);
}
.section__cta {
    text-align: center;
    margin-top: 48px;
}

/* ---------- 信任栏 ---------- */
.trust {
    padding: 40px 0;
    border-bottom: 1px solid var(--color-border);
}
.trust__label {
    text-align: center;
    font-size: 13px;
    letter-spacing: 2px;
    color: var(--color-text-muted);
    margin-bottom: 24px;
    text-transform: uppercase;
}
.trust__logos {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}
.trust__logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text-muted);
    opacity: 0.6;
    transition: var(--transition);
    padding: 8px 16px;
}
.trust__logo:hover {
    opacity: 1;
    color: var(--color-primary);
}

/* ==========================================================================
   服务卡片
   ========================================================================== */
.services { background: var(--color-bg-alt); }
.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.service-card {
    position: relative;
    background: #fff;
    padding: 36px 30px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    overflow: hidden;
}
.service-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--accent, var(--color-primary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}
.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }

.service-card__icon {
    width: 64px;
    height: 64px;
    display: grid;
    place-items: center;
    font-size: 32px;
    background: color-mix(in srgb, var(--accent, var(--color-primary)) 12%, white);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    transition: var(--transition);
}
.service-card:hover .service-card__icon {
    transform: rotate(-8deg) scale(1.05);
}
.service-card__title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
}
.service-card__desc {
    color: var(--color-text-light);
    font-size: 15px;
    margin-bottom: 18px;
}
.service-card__list {
    margin-bottom: 22px;
}
.service-card__list li {
    padding: 6px 0 6px 24px;
    position: relative;
    font-size: 14px;
    color: var(--color-text-light);
}
.service-card__list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 6px;
    width: 16px;
    height: 16px;
    background: var(--accent, var(--color-primary));
    color: #fff;
    border-radius: 50%;
    font-size: 10px;
    display: grid;
    place-items: center;
}
.service-card__link {
    font-weight: 600;
    color: var(--accent, var(--color-primary));
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.service-card__link:hover { gap: 12px; }

.service-card--wide {
    grid-column: span 2;
    background: var(--gradient-primary);
    color: #fff;
}
.service-card--wide .service-card__title,
.service-card--wide .service-card__desc { color: #fff; }
.service-card--wide .service-card__list li { color: rgba(255, 255, 255, 0.9); }
.service-card--wide .service-card__icon {
    background: rgba(255, 255, 255, 0.2);
}
.service-card--wide .service-card__list li::before {
    background: rgba(255, 255, 255, 0.9);
    color: var(--color-primary-dark);
}
.service-card--wide .service-card__link { color: #fff; }
.service-card--wide::before { display: none; }

.service-card--cta {
    background: var(--gradient-dark);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}
.service-card--cta .service-card__title,
.service-card--cta .service-card__desc { color: #fff; }
.service-card--cta::before { display: none; }

/* ==========================================================================
   关于我们
   ========================================================================== */
.about__inner {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 64px;
    align-items: center;
}
.about__visual {
    position: relative;
    padding: 40px;
}
.about__badge {
    position: absolute;
    top: 0;
    right: 20px;
    z-index: 2;
    background: #fff;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    text-align: center;
    border: 1px solid var(--color-border);
}
.about__year {
    display: block;
    font-size: 32px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}
.about__year-label {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 4px;
    display: block;
}
.about__image {
    background: var(--gradient-soft);
    border-radius: var(--radius-lg);
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border: 1px solid var(--color-border);
}
.about__image-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    height: 100%;
    gap: 2px;
}
.about__tile {
    display: grid;
    place-items: center;
    font-size: 72px;
    transition: var(--transition);
}
.about__tile--1 { background: linear-gradient(135deg, #eef2ff, #ddd6fe); }
.about__tile--2 { background: linear-gradient(135deg, #fce7f3, #fbcfe8); }
.about__tile--3 { background: linear-gradient(135deg, #dbeafe, #bfdbfe); }
.about__tile--4 { background: linear-gradient(135deg, #d1fae5, #a7f3d0); }
.about__tile:hover { transform: scale(1.1); }

.about__text {
    color: var(--color-text-light);
    font-size: 16px;
    margin-bottom: 18px;
}
.about__features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin: 32px 0;
}
.feature {
    display: flex;
    align-items: center;
    gap: 12px;
}
.feature__icon {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    background: var(--gradient-soft);
    border-radius: var(--radius-sm);
    font-size: 22px;
}
.feature strong {
    display: block;
    font-size: 15px;
}
.feature small {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* ==========================================================================
   案例展示
   ========================================================================== */
.cases__filter {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}
.filter-btn {
    padding: 8px 20px;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    background: #fff;
    color: var(--color-text-light);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}
.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.filter-btn.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.3);
}

.cases__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.case-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}
.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.case-card__img {
    aspect-ratio: 16 / 10;
    display: grid;
    place-items: center;
    position: relative;
    overflow: hidden;
}
.case-card__emoji {
    font-size: 64px;
    transition: var(--transition);
}
.case-card:hover .case-card__emoji { transform: scale(1.15); }
.case-card__body { padding: 22px 24px 26px; }
.case-card__cat {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.1);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    margin-bottom: 10px;
}
.case-card__title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}
.case-card__desc {
    font-size: 14px;
    color: var(--color-text-light);
}
.case-card.hide { display: none; }

/* ==========================================================================
   服务流程
   ========================================================================== */
.process { background: var(--color-bg-alt); }
.process__steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}
.process__steps::before {
    content: "";
    position: absolute;
    top: 36px;
    left: 12%;
    right: 12%;
    height: 2px;
    background: linear-gradient(to right, var(--color-primary-light), var(--color-secondary));
    opacity: 0.3;
}
.step {
    text-align: center;
    position: relative;
    background: #fff;
    padding: 36px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}
.step:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}
.step__num {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    display: grid;
    place-items: center;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 50%;
    font-size: 24px;
    font-weight: 800;
    box-shadow: 0 10px 24px rgba(99, 102, 241, 0.35);
    position: relative;
    z-index: 1;
}
.step__title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
}
.step__desc {
    font-size: 14px;
    color: var(--color-text-light);
}

/* ==========================================================================
   客户评价
   ========================================================================== */
.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.testimonial {
    background: #fff;
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    position: relative;
    transition: var(--transition);
}
.testimonial::before {
    content: """;
    position: absolute;
    top: 10px;
    right: 24px;
    font-size: 90px;
    line-height: 1;
    color: var(--color-primary);
    opacity: 0.12;
    font-family: Georgia, serif;
}
.testimonial:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.testimonial blockquote {
    font-size: 16px;
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 22px;
    position: relative;
    z-index: 1;
}
.testimonial__author {
    display: flex;
    align-items: center;
    gap: 12px;
}
.testimonial__avatar {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 50%;
    font-weight: 700;
    font-size: 18px;
}
.testimonial__author strong {
    display: block;
    font-size: 15px;
}
.testimonial__author small {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* ==========================================================================
   CTA 横幅
   ========================================================================== */
.cta-band {
    background: var(--gradient-dark);
    color: #fff;
    padding: 72px 0;
    position: relative;
    overflow: hidden;
}
.cta-band::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(129, 140, 248, 0.3) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(236, 72, 153, 0.25) 0%, transparent 40%);
}
.cta-band__inner {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}
.cta-band__title {
    font-size: clamp(26px, 3vw, 36px);
    font-weight: 800;
    margin-bottom: 10px;
}
.cta-band__desc {
    font-size: 17px;
    opacity: 0.85;
}
.cta-band__actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
    background: #0f172a;
    color: rgba(255, 255, 255, 0.7);
    padding: 72px 0 0;
}
.footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.4fr;
    gap: 48px;
    padding-bottom: 48px;
}
.logo--light .logo__name { color: #fff; }
.logo--light .logo__sub { color: rgba(255, 255, 255, 0.5); }
.footer__desc {
    margin: 20px 0;
    font-size: 14px;
    line-height: 1.7;
    max-width: 320px;
}
.footer__social {
    display: flex;
    gap: 12px;
}
.footer__social-link {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    font-size: 16px;
    transition: var(--transition);
}
.footer__social-link:hover {
    background: var(--gradient-primary);
    transform: translateY(-3px);
}
.footer__title {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
}
.footer__links li,
.footer__contact li {
    padding: 7px 0;
    font-size: 14px;
}
.footer__links a:hover { color: var(--color-primary-light); }
.footer__contact li { display: flex; gap: 8px; }
.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 22px 0;
    font-size: 13px;
}
.footer__bottom-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}
.footer__bottom a:hover { color: var(--color-primary-light); }

/* ==========================================================================
   返回顶部
   ========================================================================== */
.back-top {
    position: fixed;
    right: 28px;
    bottom: 28px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    font-size: 22px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}
.back-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* ==========================================================================
   滚动入场动画
   ========================================================================== */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-animate].in-view {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   子页面通用：页头横幅
   ========================================================================== */
.page-hero {
    background: var(--gradient-dark);
    color: #fff;
    padding: 80px 0 64px;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 15% 50%, rgba(129, 140, 248, 0.3) 0%, transparent 35%),
        radial-gradient(circle at 85% 30%, rgba(236, 72, 153, 0.2) 0%, transparent 35%);
}
.page-hero__inner {
    position: relative;
    text-align: center;
}
.page-hero__tag {
    display: inline-block;
    padding: 5px 14px;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}
.page-hero__title {
    font-size: clamp(32px, 4.5vw, 48px);
    font-weight: 800;
    margin-bottom: 14px;
}
.page-hero__desc {
    font-size: 17px;
    opacity: 0.85;
    max-width: 640px;
    margin: 0 auto;
}
.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 22px;
    font-size: 14px;
    opacity: 0.7;
}
.breadcrumb a:hover { opacity: 1; color: #fff; }

/* ==========================================================================
   服务详情页样式
   ========================================================================== */
.service-detail {
    padding: 80px 0;
}
.service-detail__block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
    scroll-margin-top: 100px;
}
.service-detail__block:nth-child(even) .service-detail__visual {
    order: -1;
}
.service-detail__tag {
    display: inline-block;
    padding: 5px 14px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    border-radius: var(--radius-full);
    margin-bottom: 14px;
}
.service-detail__title {
    font-size: clamp(26px, 3vw, 36px);
    font-weight: 800;
    margin-bottom: 18px;
}
.service-detail__text {
    color: var(--color-text-light);
    margin-bottom: 24px;
    font-size: 16px;
}
.service-detail__features li {
    padding: 10px 0 10px 32px;
    position: relative;
    font-size: 15px;
}
.service-detail__features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 10px;
    width: 22px;
    height: 22px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 12px;
}
.service-detail__visual {
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-lg);
    display: grid;
    place-items: center;
    font-size: 120px;
    box-shadow: var(--shadow-xl);
}

/* ==========================================================================
   关于页 - 团队 / 价值观
   ========================================================================== */
.values__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.value-card {
    text-align: center;
    padding: 36px 24px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}
.value-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.value-card__icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 18px;
    display: grid;
    place-items: center;
    background: var(--gradient-soft);
    border-radius: 50%;
    font-size: 32px;
}
.value-card__title {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
}
.value-card__desc {
    font-size: 14px;
    color: var(--color-text-light);
}

/* 时间线 */
.timeline {
    position: relative;
    max-width: 760px;
    margin: 0 auto;
    padding: 20px 0;
}
.timeline::before {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-secondary));
    opacity: 0.3;
}
.timeline__item {
    position: relative;
    width: 50%;
    padding: 20px 40px;
}
.timeline__item:nth-child(odd) {
    left: 0;
    text-align: right;
}
.timeline__item:nth-child(even) {
    left: 50%;
}
.timeline__item::before {
    content: "";
    position: absolute;
    top: 28px;
    width: 16px;
    height: 16px;
    background: #fff;
    border: 3px solid var(--color-primary);
    border-radius: 50%;
    z-index: 1;
}
.timeline__item:nth-child(odd)::before { right: -8px; }
.timeline__item:nth-child(even)::before { left: -8px; }
.timeline__year {
    font-size: 22px;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: 6px;
}
.timeline__title {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 6px;
}
.timeline__desc {
    font-size: 14px;
    color: var(--color-text-light);
}

/* ==========================================================================
   联系页
   ========================================================================== */
.contact-main {
    padding: 80px 0;
}
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}
.contact-info__card {
    background: var(--gradient-dark);
    color: #fff;
    padding: 40px;
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}
.contact-info__card::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 80% 10%, rgba(236, 72, 153, 0.25) 0%, transparent 40%),
        radial-gradient(circle at 10% 90%, rgba(129, 140, 248, 0.3) 0%, transparent 40%);
}
.contact-info__card > * { position: relative; z-index: 1; }
.contact-info__card h3 {
    font-size: 24px;
    margin-bottom: 12px;
}
.contact-info__card p {
    opacity: 0.85;
    margin-bottom: 30px;
}
.contact-info__list li {
    display: flex;
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.contact-info__list li:last-child { border-bottom: none; }
.contact-info__icon {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-sm);
    font-size: 18px;
    flex-shrink: 0;
}
.contact-info__list strong {
    display: block;
    font-size: 14px;
    opacity: 0.7;
    margin-bottom: 2px;
}
.contact-info__list span { font-size: 16px; }

/* 表单 */
.contact-form {
    background: #fff;
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}
.contact-form h3 {
    font-size: 24px;
    margin-bottom: 8px;
}
.contact-form__desc {
    color: var(--color-text-light);
    margin-bottom: 28px;
    font-size: 15px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.form-group {
    margin-bottom: 18px;
}
.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}
.form-group label .req { color: #ef4444; }
.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    background: #fff;
}
.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}
textarea.form-control {
    min-height: 130px;
    resize: vertical;
}
.form-success {
    display: none;
    padding: 16px;
    background: #d1fae5;
    color: #065f46;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: 500;
}
.form-success.show { display: block; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
    .hero__inner,
    .about__inner,
    .contact-grid,
    .service-detail__block {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .service-detail__block:nth-child(even) .service-detail__visual { order: 0; }
    .hero__visual { height: 380px; }
    .services__grid,
    .cases__grid,
    .testimonials__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .service-card--wide { grid-column: span 2; }
    .values__grid { grid-template-columns: repeat(2, 1fr); }
    .footer__inner {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
}

@media (max-width: 768px) {
    .section { padding: 64px 0; }
    .top-bar__text { font-size: 12px; }

    /* 移动端导航 */
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 90px 24px 30px;
        gap: 4px;
        box-shadow: -10px 0 40px rgba(0, 0, 0, 0.15);
        transition: right 0.35s ease;
        z-index: 999;
    }
    .nav.open { right: 0; }
    .nav__link {
        padding: 14px 16px;
        border-radius: var(--radius-sm);
        font-size: 16px;
    }
    .nav__cta {
        margin: 12px 0 0;
        width: 100%;
    }
    .nav-toggle { display: flex; z-index: 1001; }

    .hero { padding: 48px 0 64px; }
    .hero__stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
    }
    .stat__num { font-size: 28px; }

    .services__grid,
    .cases__grid,
    .testimonials__grid,
    .values__grid {
        grid-template-columns: 1fr;
    }
    .service-card--wide { grid-column: span 1; }

    .process__steps {
        grid-template-columns: 1fr 1fr;
    }
    .process__steps::before { display: none; }

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

    .form-row { grid-template-columns: 1fr; }

    .footer__inner { grid-template-columns: 1fr; }
    .footer__bottom-inner { flex-direction: column; text-align: center; }

    .cta-band__inner { text-align: center; justify-content: center; }

    /* 时间线移动端 */
    .timeline::before { left: 20px; }
    .timeline__item {
        width: 100%;
        left: 0 !important;
        text-align: left !important;
        padding: 16px 0 16px 50px;
    }
    .timeline__item::before {
        left: 12px !important;
        right: auto !important;
    }
}

@media (max-width: 480px) {
    .container { padding: 0 18px; }
    .hero__actions .btn,
    .cta-band__actions .btn { width: 100%; }
    .process__steps { grid-template-columns: 1fr; }
    .contact-info__card,
    .contact-form { padding: 28px 22px; }
}

/* 打印优化 */
@media print {
    .header, .top-bar, .back-top, .nav-toggle, .hero__scroll { display: none; }
}