:root {
    --bg-gradient: linear-gradient(150deg, #e8f4ff 0%, #fff4f7 45%, #f3fbff 100%);
    --primary: #2f6bff;
    --secondary: #ff8a5b;
    --accent: #20c997;
    --deep: #1f2d5c;
    --text: #3c476b;
    --soft: #f4f6ff;
    --card-shadow: 0 22px 48px rgba(47, 107, 255, 0.12);
    --round: 28px;
    --max-width: 1360px;
    --transition: cubic-bezier(0.22, 1, 0.36, 1);
}

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

body {
    font-family: "Nunito", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg-gradient);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.6;
}

/* 背景装饰 */
body::before,
body::after {
    content: "";
    position: fixed;
    pointer-events: none;
    z-index: -1;
    border-radius: 46% 54% 47% 53%/60% 39% 61% 40%;
    background: rgba(47, 107, 255, 0.08);
    filter: blur(0);
    animation: drift 24s ease-in-out infinite;
}

body::before {
    width: 540px;
    height: 540px;
    top: -180px;
    right: -120px;
}

body::after {
    width: 460px;
    height: 460px;
    bottom: -220px;
    left: -140px;
    animation-delay: 6s;
    background: rgba(255, 138, 91, 0.08);
}

/* 导航栏 */
header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px);
    box-shadow: 0 12px 20px rgba(47, 107, 255, 0.08);
}

.nav {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 18px 32px;
    position: relative;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.12rem;
    color: var(--deep);
    text-decoration: none;
}

.brand span {
    font-size: 28px;
    animation: bounce 2s infinite;
}

.nav-links {
    display: flex;
    gap: 24px;
    font-size: 0.95rem;
    flex-wrap: nowrap;
}

.nav-links a {
    font-weight: 600;
    position: relative;
    padding-bottom: 6px;
    color: var(--text);
    text-decoration: none;
    transition: color 0.2s ease;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 3px;
    border-radius: 4px;
    background: var(--secondary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s var(--transition);
}

.nav-links a:hover::after {
    transform: scaleX(1);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: nowrap;
}

.language-switch {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    border-radius: 999px;
    background: rgba(47, 107, 255, 0.08);
    border: 1px solid rgba(47, 107, 255, 0.2);
    box-shadow: 0 6px 16px rgba(47, 107, 255, 0.1);
}

.language-switch .lang-option {
    border: none;
    background: transparent;
    color: var(--text);
    font-weight: 700;
    font-size: 0.85rem;
    padding: 6px 12px;
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.2s var(--transition), color 0.2s var(--transition), box-shadow 0.2s var(--transition);
}

.language-switch .lang-option.is-active {
    background: #ffffff;
    color: var(--primary);
    box-shadow: 0 10px 20px rgba(47, 107, 255, 0.25);
}

.language-switch .lang-option:focus-visible {
    outline: 2px solid rgba(47, 107, 255, 0.45);
    outline-offset: 2px;
}

@media (max-width: 1100px) {
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-actions {
        flex-wrap: wrap;
        justify-content: center;
    }
}

.nav-pill {
    font-weight: 700;
    font-size: 0.92rem;
    color: var(--primary);
    padding: 11px 24px;
    border-radius: 999px;
    background: rgba(47, 107, 255, 0.12);
    border: none;
    cursor: pointer;
    transition: transform 0.2s var(--transition), box-shadow 0.2s var(--transition);
}

.nav-pill:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 22px rgba(47, 107, 255, 0.18);
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 11px 24px;
    border-radius: 999px;
    border: none;
    font-weight: 700;

    font-size: 0.92rem;
    color: white;
    background: linear-gradient(135deg, var(--primary), #7c9bff);
    cursor: pointer;
    box-shadow: 0 14px 25px rgba(48, 108, 255, 0.25);
    transition: transform 0.25s var(--transition), box-shadow 0.25s var(--transition);
    position: relative;
    overflow: hidden;
}

.cta-btn::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.35);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
}

.cta-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 32px rgba(48, 108, 255, 0.32);
}

.cta-btn:hover::after {
    width: 200px;
    height: 200px;
}

.secondary-btn {
    padding: 10px 20px;
    border-radius: 999px;
    border: 2px dashed rgba(47, 107, 255, 0.45);
    background: rgba(255, 255, 255, 0.85);
    font-weight: 700;
    color: var(--primary);
    cursor: pointer;
    transition: transform 0.25s var(--transition), box-shadow 0.25s var(--transition), border-color 0.25s ease;
}

.secondary-btn:hover {
    transform: translateY(-3px);
    border-color: rgba(47, 107, 255, 0.8);
    box-shadow: 0 16px 30px rgba(47, 107, 255, 0.15);
}

/* 主要内容区 */
section {
    padding: 108px 32px;
    position: relative;
}

.section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

[data-animate] {
    opacity: 0;
    transform: translateY(30px) scale(0.96);
    transition: opacity 0.6s ease, transform 0.6s var(--transition);
}

[data-animate].is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* 首页横幅 */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: minmax(320px, 520px) minmax(360px, 1fr);
    gap: 72px;
    align-items: center;
}

.hero-text h1 {
    font-size: clamp(2.4rem, 4.5vw, 3.35rem);
    color: var(--deep);
    margin: 0 0 22px;
    line-height: 1.12;
}

.hero-text p {
    font-size: 1.06rem;
    margin: 0 0 30px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    margin-bottom: 30px;
}

.hero-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    max-width: 480px;
}

.hero-highlights span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 999px;
    padding: 12px 20px;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--primary);
    box-shadow: 0 12px 24px rgba(47, 107, 255, 0.1);
    transition: transform 0.3s var(--transition);
}

.hero-highlights span:hover {
    transform: translateY(-6px) rotate(-2deg);
}

.hero-illustration {
    position: relative;
    background: linear-gradient(145deg, #ffffff, rgba(233, 241, 255, 0.8));
    border-radius: 42px;
    padding: 56px 36px;
    min-height: 340px;
    box-shadow: 0 40px 70px rgba(47, 107, 255, 0.15);
    overflow: hidden;
}

.hero-illustration::before,
.hero-illustration::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    opacity: 0.55;
    animation: float 12s ease-in-out infinite;
}

.hero-illustration::before {
    width: 360px;
    height: 360px;
    background: linear-gradient(135deg, #8ce0ff, #6b8dff);
    top: -140px;
    right: -110px;
}

.hero-illustration::after {
    width: 240px;
    height: 240px;
    background: linear-gradient(135deg, #ffb452, #ff7ab4);
    bottom: -90px;
    left: -70px;
    animation-delay: 4s;
}

/* 机器人动画 */
.hero-robot {
    position: relative;
    width: 220px;
    height: 240px;
    margin: 0 auto;
}

.hero-robot .body {
    position: absolute;
    inset: 52px 12px 0;
    background: white;
    border-radius: 30px;
    box-shadow: 0 18px 32px rgba(47, 107, 255, 0.18);
    overflow: hidden;
}

.hero-robot .body::after {
    content: "";
    position: absolute;
    inset: 18px 18px 28px;
    border-radius: 22px;
    background: repeating-linear-gradient(135deg, rgba(47, 107, 255, 0.18), rgba(47, 107, 255, 0.18) 8px, transparent 8px, transparent 20px);
    opacity: 0.7;
}

.hero-robot .head {
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 170px;
    height: 126px;
    background: linear-gradient(135deg, var(--primary), #74b0ff);
    border-radius: 44px;
    box-shadow: 0 18px 28px rgba(47, 107, 255, 0.22);
}

.hero-robot .face {
    position: absolute;
    top: 28px;
    left: 50%;
    transform: translateX(-50%);
    width: 126px;
    height: 64px;
    background: white;
    border-radius: 26px;
    display: flex;
    align-items: center;
    justify-content: space-evenly;
    overflow: hidden;
}

.hero-robot .eye {
    width: 26px;
    height: 26px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: inset -3px -5px 0 rgba(255, 255, 255, 0.25);
    animation: blink 6s ease-in-out infinite;
}

.hero-robot .eye:nth-child(2) {
    animation-delay: 1.4s;
}

.hero-robot .antenna {
    position: absolute;
    top: -32px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 30px;
    background: white;
    border-radius: 999px;
}

.hero-robot .antenna::after {
    content: "";
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--secondary);
    box-shadow: 0 6px 12px rgba(255, 138, 91, 0.4);
    animation: pulse 3.4s ease-in-out infinite;
}

.hero-robot .spark {
    position: absolute;
    width: 12px;
    height: 12px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.22);
    animation: float 6s ease-in-out infinite;
}

.hero-robot .spark:nth-child(1) {
    top: 18%;
    left: 6%;
    animation-delay: 0.4s;
}

.hero-robot .spark:nth-child(2) {
    top: 60%;
    right: 6%;
    animation-delay: 1s;
}

.hero-robot .spark:nth-child(3) {
    top: 12%;
    right: 18%;
    animation-delay: 1.6s;
}

/* 徽章 */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(47, 107, 255, 0.12);
    color: var(--primary);
    border-radius: 999px;
    padding: 8px 18px;
    font-weight: 700;
    font-size: 0.82rem;
    margin-bottom: 22px;
}

.badge i {
    display: inline-block;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
}

/* 标题 */
.section-title {
    font-size: 2.05rem;
    margin-bottom: 18px;
    color: var(--deep);
}

.section-subtitle {
    max-width: 580px;
    font-size: 1rem;
    margin-bottom: 52px;
    color: rgba(53, 64, 99, 0.85);
}

/* AI平台功能概览卡片 */
.ai-platform-summary {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-top: 48px;
}

.summary-card {
    background: white;
    border-radius: 28px;
    padding: 36px 32px;
    box-shadow: 0 18px 48px rgba(47, 107, 255, 0.12);
    transition: all 0.4s var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.summary-card::before {
    content: "";
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(47, 107, 255, 0.08), transparent 70%);
    border-radius: 50%;
    transition: transform 0.4s var(--transition);
}

.summary-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 28px 64px rgba(47, 107, 255, 0.18);
}

.summary-card:hover::before {
    transform: scale(1.2);
}

.summary-icon {
    font-size: 56px;
    margin-bottom: 20px;
    display: inline-block;
    position: relative;
    z-index: 1;
    animation: float 3s ease-in-out infinite;
}

.summary-card h3 {
    font-size: 1.4rem;
    color: var(--deep);
    margin: 0 0 12px;
    position: relative;
    z-index: 1;
}

.summary-card > p {
    font-size: 0.95rem;
    color: var(--text);
    margin: 0 0 20px;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.summary-features {
    list-style: none;
    padding: 0;
    margin: 0;
    position: relative;
    z-index: 1;
}

.summary-features li {
    padding: 10px 0 10px 28px;
    font-size: 0.9rem;
    color: var(--text);
    position: relative;
    line-height: 1.5;
}

.summary-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, var(--primary), #7c9bff);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

/* 平台功能展示 */
.ai-platform-container {
    background: linear-gradient(145deg, #ffffff, rgba(244, 246, 255, 0.95));
    border-radius: 48px;
    padding: 56px 48px;
    margin-top: 48px;
    box-shadow: 0 32px 80px rgba(47, 107, 255, 0.14);
    position: relative;
    overflow: hidden;
}

.ai-platform-container::before {
    content: "";
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(47, 107, 255, 0.08), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.ai-platform-container::after {
    content: "";
    position: absolute;
    bottom: -120px;
    left: -120px;
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(255, 138, 91, 0.08), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.platform-features {
    margin-top: 48px;
}

.feature-category {
    background: white;
    border-radius: 32px;
    padding: 40px 36px;
    margin-bottom: 32px;
    box-shadow: 0 16px 40px rgba(47, 107, 255, 0.08);
    transition: transform 0.4s var(--transition), box-shadow 0.4s var(--transition);
    position: relative;
    z-index: 1;
}

.feature-category:hover {
    transform: translateY(-6px);
    box-shadow: 0 24px 56px rgba(47, 107, 255, 0.12);
}

.ai-platform-container .feature-category:last-child {
    margin-bottom: 0;
}

.category-header {
    text-align: center;
    margin-bottom: 36px;
}

.category-icon {
    font-size: 64px;
    margin-bottom: 16px;
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

.category-header h3 {
    font-size: 1.8rem;
    color: var(--deep);
    margin: 0 0 12px;
}

.category-header p {
    color: var(--text);
    font-size: 1rem;
    margin: 0;
}

.feature-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.mini-card {
    background: var(--soft);
    border-radius: 20px;
    padding: 20px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
    transition: all 0.3s var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.mini-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(47, 107, 255, 0.05), rgba(255, 138, 91, 0.05));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mini-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 32px rgba(47, 107, 255, 0.15);
}

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

.mini-icon {
    font-size: 32px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.mini-card div {
    position: relative;
    z-index: 1;
}

.mini-card strong {
    display: block;
    font-size: 1rem;
    color: var(--deep);
    margin-bottom: 4px;
}

.mini-card p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text);
    line-height: 1.4;
}

/* 表单提示 */
.form-hint {
    display: block;
    margin-top: 6px;
    font-size: 0.8rem;
    color: var(--text);
    opacity: 0.7;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group select {
    padding: 14px 18px;
    border: 2px solid rgba(47, 107, 255, 0.2);
    border-radius: 16px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
    cursor: pointer;
}

.form-group select:disabled {
    background: #f5f5f5;
    cursor: not-allowed;
    opacity: 0.6;
}

.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(47, 107, 255, 0.1);
}

.form-group input:invalid {
    border-color: rgba(255, 107, 107, 0.3);
}

.form-group input:valid {
    border-color: rgba(32, 201, 151, 0.3);
}

/* 卡片网格 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 36px;
    align-items: stretch;
}

.card {
    background: white;
    border-radius: calc(var(--round) + 4px);
    padding: 32px 30px;
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
    transition: transform 0.4s var(--transition), box-shadow 0.4s var(--transition);
    display: flex;
    flex-direction: column;
}

.card::before,
.card::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    opacity: 0.12;
    transition: transform 0.4s var(--transition), opacity 0.4s ease;
}

.card::before {
    width: 140px;
    height: 140px;
    background: rgba(47, 107, 255, 0.5);
    right: -50px;
    top: -60px;
}

.card::after {
    width: 220px;
    height: 220px;
    background: rgba(255, 138, 91, 0.45);
    left: -120px;
    bottom: -140px;
}

.card:hover {
    transform: translateY(-16px) rotate3d(1, 1, 0, 4deg);
    box-shadow: 0 32px 70px rgba(47, 107, 255, 0.18);
}

.card:hover::before,
.card:hover::after {
    opacity: 0.2;
    transform: translateY(14px);
}

.card-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.card h3 {
    margin-top: 0;
    margin-bottom: 14px;
    font-size: 1.26rem;
    color: var(--deep);
}

.card p {
    margin: 0 0 16px;
    font-size: 0.97rem;
    line-height: 1.68;
}

.feature-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.feature-list li {
    padding: 6px 0;
    font-size: 0.92rem;
    color: var(--text);
}

/* 平台区域 */
.platform-hub {
    margin-top: 56px;
    background: white;
    border-radius: 48px;
    padding: 64px 56px;
    box-shadow: 0 34px 80px rgba(47, 107, 255, 0.14);
    position: relative;
    overflow: hidden;
}

.platform-hub::before,
.platform-hub::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    opacity: 0.28;
}

.platform-hub::before {
    width: 320px;
    height: 320px;
    background: linear-gradient(135deg, rgba(47, 107, 255, 0.2), rgba(111, 215, 255, 0.24));
    top: -160px;
    right: -120px;
}

.platform-hub::after {
    width: 280px;
    height: 280px;
    background: linear-gradient(135deg, rgba(255, 138, 91, 0.18), rgba(255, 200, 149, 0.24));
    bottom: -160px;
    left: -120px;
}

.platform-headline {
    display: grid;
    grid-template-columns: minmax(260px, 420px) minmax(280px, 1fr);
    gap: 48px;
    position: relative;
    z-index: 1;
    align-items: center;
}

.platform-copy h3 {
    margin: 0 0 18px;
    font-size: 1.5rem;
    color: var(--deep);
}

.platform-copy p {
    line-height: 1.7;
    margin-bottom: 18px;
}

.platform-copy ul {
    margin: 0;
    padding-left: 18px;
    color: rgba(53, 64, 99, 0.8);
    line-height: 1.7;
    font-size: 0.95rem;
}

.platform-illustration {
    position: relative;
    background: linear-gradient(135deg, rgba(244, 246, 255, 0.9), rgba(233, 241, 255, 0.65));
    border-radius: 40px;
    padding: 36px;
    box-shadow: 0 24px 60px rgba(47, 107, 255, 0.14);
}

.platform-illustration::after {
    content: "";
    position: absolute;
    inset: 18px;
    border-radius: 32px;
    border: 2px dashed rgba(47, 107, 255, 0.16);
}

.platform-console {
    display: grid;
    gap: 18px;
    position: relative;
    z-index: 1;
}

.platform-console .chip-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.platform-console .chip {
    padding: 10px 16px;
    border-radius: 999px;
    background: rgba(47, 107, 255, 0.12);
    color: var(--primary);
    font-weight: 700;
    font-size: 0.82rem;
}

.progress-track {
    width: 100%;
    height: 10px;
    background: rgba(47, 107, 255, 0.15);
    border-radius: 999px;
    position: relative;
    overflow: hidden;
}

.progress-fill {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--secondary), #ffc085);
    border-radius: inherit;
    transform-origin: left;
    animation: progress 7s ease-in-out infinite;
}

.platform-grid {
    margin-top: 48px;
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 28px;
}

.platform-card {
    background: rgba(244, 246, 255, 0.96);
    border-radius: 32px;
    padding: 28px 24px 32px;
    box-shadow: 0 18px 48px rgba(47, 107, 255, 0.12);
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: transform 0.3s var(--transition), box-shadow 0.3s var(--transition);
}

.platform-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 28px 60px rgba(47, 107, 255, 0.16);
}

.platform-icon {
    width: 52px;
    height: 52px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: 0 14px 28px rgba(47, 107, 255, 0.16);
}

.platform-card h3 {
    margin: 0;
    font-size: 1.08rem;
    color: var(--deep);
}

.platform-card p {
    margin: 0;
    line-height: 1.6;
    font-size: 0.95rem;
    color: rgba(49, 59, 97, 0.8);
}

/* 竞赛区域 */
.mission-zone {
    display: grid;
    grid-template-columns: minmax(320px, 500px) minmax(440px, 1fr);
    gap: 64px;
    align-items: center;
}

.mission-copy h2 {
    margin-bottom: 18px;
}

.mission-copy p {
    margin-bottom: 24px;
    max-width: 520px;
    line-height: 1.7;
}

.mission-copy ul {
    margin: 0 0 30px 0;
    padding-left: 20px;
    line-height: 1.7;
    font-size: 0.97rem;
}

.achievement-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-box {
    background: white;
    padding: 24px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 18px 40px rgba(47, 107, 255, 0.12);
    transition: transform 0.3s var(--transition);
}

.stat-box:hover {
    transform: scale(1.05);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text);
    margin-top: 8px;
    font-size: 0.95rem;
}

.mission-board {
    position: relative;
    background: white;
    border-radius: 46px;
    padding: 52px 48px;
    box-shadow: 0 38px 80px rgba(47, 107, 255, 0.16);
    overflow: hidden;
}

.mission-board::before {
    content: "";
    position: absolute;
    inset: -40px;
    background: radial-gradient(circle at 20% 20%, rgba(47, 107, 255, 0.08), transparent 55%),
        radial-gradient(circle at 80% 78%, rgba(255, 138, 91, 0.12), transparent 60%);
    z-index: 0;
}

.mission-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(2, minmax(200px, 1fr));
    gap: 28px;
}

.mission-card {
    background: rgba(244, 246, 255, 0.98);
    border-radius: 28px;
    padding: 28px 24px;
    box-shadow: 0 16px 36px rgba(47, 107, 255, 0.12);
    position: relative;
    transition: transform 0.35s var(--transition), box-shadow 0.35s var(--transition);
    display: flex;
    flex-direction: column;
}

.mission-card:hover {
    transform: translateY(-12px) rotate(-1.5deg);
    box-shadow: 0 24px 50px rgba(47, 107, 255, 0.18);
}

.mission-icon {
    width: 52px;
    height: 52px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    margin-bottom: 16px;
    color: white;
    font-size: 1.4rem;
    box-shadow: 0 14px 24px rgba(47, 107, 255, 0.2);
}

.mission-card h3 {
    margin: 0 0 10px;
    font-size: 1.05rem;
    color: var(--deep);
}

.mission-card p {
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.55;
    color: rgba(49, 59, 97, 0.78);
}

/* 联系区域 */
.cta-final {
    text-align: center;
    padding: 84px 48px;
    background: white;
    border-radius: 40px;
    box-shadow: 0 32px 74px rgba(47, 107, 255, 0.14);
}

.cta-final h2 {
    margin: 0 0 18px;
    font-size: clamp(2rem, 4vw, 2.6rem);
    color: var(--deep);
}

.cta-final p {
    margin: 0 0 34px;
    font-size: 1rem;
}

.cta-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    text-align: left;
    background: var(--soft);
    padding: 24px;
    border-radius: 20px;
}

.contact-item span {
    font-size: 32px;
}

.contact-item strong {
    display: block;
    margin-bottom: 6px;
    color: var(--deep);
}

.contact-item p {
    margin: 0;
    color: var(--text);
    font-size: 0.95rem;
}

/* 页脚 */
footer {
    background: rgba(31, 45, 92, 0.94);
    color: white;
    padding: 48px 32px;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-inner h4 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 1rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.footer-inner ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-inner li {
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.footer-inner a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-inner a:hover {
    color: white;
}

.footer-note {
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(31, 45, 92, 0.7);
    backdrop-filter: blur(8px);
    z-index: 1000;
    overflow-y: auto;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 20px;
    padding-top: 40px;
}

.modal-content {
    background: white;
    border-radius: 32px;
    padding: 48px 40px;
    max-width: 480px;
    width: 100%;
    position: relative;
    box-shadow: 0 40px 100px rgba(47, 107, 255, 0.3);
    animation: slideUp 0.4s var(--transition);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(47, 107, 255, 0.1);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 24px;
    color: var(--primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: rgba(47, 107, 255, 0.2);
    transform: rotate(90deg);
}

.modal-header {
    text-align: center;
    margin-bottom: 32px;
}

.modal-header h2 {
    margin: 0 0 8px;
    font-size: 2rem;
    color: var(--deep);
}

.modal-header p {
    margin: 0;
    color: var(--text);
    font-size: 0.95rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--deep);
    font-size: 0.9rem;
}

.form-group input {
    padding: 14px 18px;
    border: 2px solid rgba(47, 107, 255, 0.2);
    border-radius: 16px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(47, 107, 255, 0.1);
}

.captcha-group {
    display: flex;
    gap: 12px;
    align-items: center;
}

.captcha-group input {
    flex: 1;
}

.captcha-group canvas {
    border: 2px solid rgba(47, 107, 255, 0.2);
    border-radius: 12px;
    cursor: pointer;
}

.refresh-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(47, 107, 255, 0.1);
    border-radius: 12px;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.refresh-btn:hover {
    background: rgba(47, 107, 255, 0.2);
    transform: rotate(180deg);
}

.sms-group {
    display: flex;
    gap: 12px;
}

.sms-group input {
    flex: 1;
}

.sms-btn {
    padding: 14px 24px;
    border: none;
    background: rgba(47, 107, 255, 0.12);
    color: var(--primary);
    border-radius: 16px;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.3s ease;
}

.sms-btn:hover:not(:disabled) {
    background: rgba(47, 107, 255, 0.2);
}

.sms-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox input {
    cursor: pointer;
}

.form-options a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.form-options a:hover {
    text-decoration: underline;
}

.auth-form .cta-btn {
    margin-top: 10px;
    width: 100%;
    padding: 16px;
    font-size: 1.05rem;
}

.form-footer {
    text-align: center;
    color: var(--text);
    font-size: 0.95rem;
}

.form-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
    margin-left: 6px;
}

.form-footer a:hover {
    text-decoration: underline;
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-6px);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateY(-12px);
        opacity: 0.85;
    }
}

@keyframes drift {
    0% {
        transform: translate3d(0, 0, 0) rotate(0deg);
    }
    50% {
        transform: translate3d(12px, 24px, 0) rotate(6deg);
    }
    100% {
        transform: translate3d(0, 0, 0) rotate(0deg);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: translateX(-50%) scale(1);
    }
    50% {
        transform: translateX(-50%) scale(1.16);
    }
}

@keyframes blink {
    0%, 46%, 48%, 100% {
        transform: scaleY(1);
    }
    47% {
        transform: scaleY(0.1);
    }
}

@keyframes progress {
    0%, 100% {
        transform: scaleX(0.25);
    }
    50% {
        transform: scaleX(0.92);
    }
}

/* 响应式 */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .hero-illustration {
        order: -1;
    }

    .mission-zone {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .platform-headline {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .ai-platform-summary {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

@media (max-width: 768px) {
    .nav {
        flex-wrap: wrap;
    }

    .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
    }

    section {
        padding: 80px 20px;
    }

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

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

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

    .modal-content {
        padding: 32px 24px;
    }
}

@media (max-width: 540px) {
    .hero-actions,
    .cta-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions button,
    .cta-actions button {
        width: 100%;
    }

    .achievement-stats {
        grid-template-columns: 1fr;
    }

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