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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f5f5;
    padding: 0px;
    line-height: 1.6;
    padding-bottom: 80px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background-color: #fff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
}

.section {
    margin-bottom: 20px;
}

a.btn, a.btn:link, a.btn:visited, a.btn:hover, a.btn:active {
    text-decoration: none;
}

a.btn-primary, a.btn-primary:link, a.btn-primary:visited, a.btn-primary:hover, a.btn-primary:active {
    color: #fff;
}

a.btn-secondary, a.btn-secondary:link, a.btn-secondary:visited, a.btn-secondary:hover, a.btn-secondary:active {
    color: #333;
}

.label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #333;
    margin-bottom: 8px;
}

.input {
    width: 100%;
    height: 44px;
    padding: 0 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    background-color: #fff;
    transition: border-color 0.3s;
}

.input:focus {
    outline: none;
    border-color: #007bff;
}

.input::placeholder {
    color: #999;
}

.main-image {
    width: 100%;
    border-radius: 10px;
    overflow: hidden;
    background-color: #f8f9fa;
    position: relative;
}

.main-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.image-grid {
    display: flex;
    gap: 10px;
}

.grid-item {
    flex: 1;
}

.grid-item img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    object-fit: cover;
}

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

.btn {
    flex: 1;
    height: 48px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    transition: opacity 0.3s;
}

.btn:active {
    opacity: 0.8;
}

.btn-primary {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: #fff;
}

.btn-secondary {
    background-color: #f0f0f0;
    color: #333;
}

.btn-icon {
    font-size: 18px;
}

.scroll-container {
    width: 100%;
    overflow: hidden;
    white-space: nowrap;
    border-radius: 10px;
    padding: 5px 0;
}

.scroll-wrapper {
    display: inline-flex;
    gap: 10px;
    padding: 5px 0;
    animation: scroll 20s linear infinite;
}

.scroll-wrapper:hover {
    animation-play-state: paused;
}

.scroll-item {
    flex-shrink: 0;
}

.scroll-item img {
    width: 140px;
    height: auto;
    border-radius: 8px;
    object-fit: cover;
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.text-content {
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 10px;
    font-size: 14px;
    color: #333;
    line-height: 1.8;
}

.text-content p {
    margin-bottom: 10px;
}

.text-content p:last-child {
    margin-bottom: 0;
}

.floating-btn {
    position: fixed;
    bottom: 20px;
    left: 15px;
    right: 15px;
    max-width: 600px;
    margin: 0 auto;
    z-index: 1000;
}

.floating-btn .btn {
    width: 100%;
    height: 52px;
    font-size: 17px;
    box-shadow: 0 4px 16px rgba(0, 123, 255, 0.35);
    border-radius: 12px;
}

.floating-btn .btn-icon {
    font-size: 20px;
}

.container img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
}

.main-image img {
    max-height: 400px;
}

/* ============== AI Cooperation Landing Page ============== */
:root {
    --c-primary: #2b6df0;
    --c-primary-dark: #1d4ed8;
    --c-accent: #6c5ce7;
    --c-green: #25d366;
    --c-green-dark: #128c7e;
    --c-orange: #f59e0b;
    --c-text: #0f172a;
    --c-text-2: #475569;
    --c-text-3: #94a3b8;
    --c-bg: #f8fafc;
    --c-card: #ffffff;
    --c-border: #e2e8f0;
    --c-dark: #0f172a;
    --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
    --shadow-glow: 0 12px 28px rgba(43, 109, 240, 0.28);
    --shadow-green: 0 14px 32px rgba(37, 211, 102, 0.4);
}

.ai-container {
    padding: 16px;
    background: var(--c-bg);
    max-width: 600px;
    margin: 0 auto;
    color: var(--c-text);
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Segoe UI', Roboto, sans-serif;
}

/* ============ HERO ============ */
.ai-hero {
    position: relative;
    padding: 24px 20px 22px;
    margin-bottom: 18px;
    background:
        radial-gradient(circle at 100% 0%, rgba(108, 92, 231, 0.12), transparent 55%),
        radial-gradient(circle at 0% 100%, rgba(43, 109, 240, 0.1), transparent 50%),
        linear-gradient(135deg, #ffffff 0%, #f5f7ff 100%);
    border-radius: 24px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border: 1px solid rgba(43, 109, 240, 0.08);
}

.ai-hero-bg {
    position: absolute;
    top: -40px;
    right: -40px;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.18), transparent 65%);
    filter: blur(20px);
    pointer-events: none;
}

.ai-tag {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #10b981, #059669);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.2px;
    padding: 8px 16px;
    border-radius: 999px;
    margin-bottom: 16px;
    box-shadow: 0 6px 14px rgba(16, 185, 129, 0.32);
}

.ai-tag-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.8);
    animation: pulse 1.8s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.8); }
    50% { box-shadow: 0 0 0 6px rgba(255, 255, 255, 0); }
}

.ai-title {
    position: relative;
    font-size: 26px;
    font-weight: 800;
    line-height: 1.3;
    color: var(--c-text);
    margin-bottom: 14px;
    letter-spacing: -0.3px;
}

.ai-title .hl-blue {
    color: var(--c-primary);
    background: linear-gradient(120deg, #2b6df0, #6c5ce7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ai-subtitle {
    position: relative;
    font-size: 14px;
    color: var(--c-text-2);
    line-height: 1.75;
    margin-bottom: 18px;
}

.ai-hero-img {
    position: relative;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.ai-hero-img > img {
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.ai-hero-img:hover > img {
    transform: scale(1.03);
}

/* ============ INTRO TEXT ============ */
.ai-intro {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-left: 4px solid var(--c-primary);
    border-radius: 16px;
    padding: 18px 20px;
    margin-bottom: 18px;
    box-shadow: var(--shadow-sm);
}

.ai-intro > p {
    font-size: 14px;
    color: var(--c-text);
    line-height: 1.7;
    margin-bottom: 12px;
    font-weight: 500;
}

.ai-intro-list {
    list-style: none;
    padding: 0;
    margin: 0 0 14px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px 14px;
}

.ai-intro-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--c-text);
    line-height: 1.45;
}

.ai-intro-list .check {
    flex-shrink: 0;
    font-size: 14px;
    line-height: 1.45;
}

.ai-intro-note {
    margin: 0;
    padding: 12px 14px;
    background: linear-gradient(135deg, #eff6ff, #f0f9ff);
    border-radius: 10px;
    font-size: 12.5px;
    color: var(--c-text-2);
    line-height: 1.65;
    border-left: 3px solid #10b981;
}

@media (max-width: 380px) {
    .ai-intro-list { grid-template-columns: 1fr; }
}

/* ============ FEATURES ROW ============ */
.ai-features {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    padding: 18px 12px;
    background: var(--c-card);
    border-radius: 18px;
    margin-bottom: 18px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--c-border);
}

.ai-feature {
    text-align: center;
    transition: transform 0.3s ease;
}

.ai-feature:hover { transform: translateY(-3px); }

.ai-feature-icon {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    margin: 0 auto 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 22px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.ai-feature-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.25), transparent);
    border-radius: 14px 14px 0 0;
}

.ic-green  { background: linear-gradient(135deg, #10b981, #059669); }
.ic-blue   { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.ic-purple { background: linear-gradient(135deg, #a855f7, #6d28d9); }
.ic-orange { background: linear-gradient(135deg, #f59e0b, #d97706); }
.ic-teal   { background: linear-gradient(135deg, #14b8a6, #0f766e); }

.ai-feature-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--c-text);
    line-height: 1.3;
}

/* ============ LEARN SECTION ============ */
.ai-learn {
    background:
        radial-gradient(circle at 100% 0%, rgba(59, 130, 246, 0.18), transparent 50%),
        radial-gradient(circle at 0% 100%, rgba(168, 85, 247, 0.14), transparent 55%),
        linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    color: #fff;
    border-radius: 22px;
    padding: 24px 20px;
    margin-bottom: 18px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.2);
    position: relative;
    overflow: hidden;
}

.ai-learn::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
    pointer-events: none;
}

.ai-learn-text { position: relative; }

.ai-learn-title {
    font-size: 24px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 18px;
    letter-spacing: -0.3px;
}

.ai-learn-title .hl-green {
    color: #34d399;
    text-shadow: 0 0 24px rgba(52, 211, 153, 0.4);
}

.ai-learn-list {
    list-style: none;
    padding: 0;
    margin: 0 0 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ai-learn-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
    backdrop-filter: blur(10px);
    transition: transform 0.25s, background 0.25s;
}

.ai-learn-list li:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(4px);
}

.ai-learn-list .num {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 9px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 800;
    color: #fff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    letter-spacing: 0.5px;
}
.n1 { background: linear-gradient(135deg, #10b981, #059669); }
.n2 { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.n3 { background: linear-gradient(135deg, #a855f7, #6d28d9); }
.n4 { background: linear-gradient(135deg, #f59e0b, #d97706); }
.n5 { background: linear-gradient(135deg, #14b8a6, #0f766e); }

.ai-learn-list .em {
    color: #34d399;
    font-weight: 700;
}

.ai-learn-img-wrap {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    border: 2px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
}

.ai-learn-img-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(15, 23, 42, 0.4));
    pointer-events: none;
}

.ai-learn-img-wrap img {
    width: 100%;
    max-width: 280px;
    height: auto;
    aspect-ratio: 1;
    object-fit: cover;
    display: block;
    margin: 0 auto;
}

/* ============ FLEX SECTION ============ */
.ai-flex {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: 20px;
    padding: 22px 16px 18px;
    margin-bottom: 18px;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.ai-flex::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #3b82f6, #10b981, #a855f7);
}

.ai-flex-header {
    text-align: center;
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 18px;
    letter-spacing: 4px;
}

.ai-flex-header .fl { color: var(--c-text); }
.ai-flex-header .sm { color: #10b981; }
.ai-flex-header .sp { color: #a855f7; }
.ai-flex-header .dot {
    color: var(--c-text-3);
    font-weight: 400;
    margin: 0 2px;
}

.ai-flex-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.ai-flex-item {
    text-align: center;
    padding: 14px 6px 12px;
    border-radius: 14px;
    background: linear-gradient(180deg, #f8fafc, #ffffff);
    border: 1px solid var(--c-border);
    transition: all 0.3s ease;
}

.ai-flex-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--c-primary);
}

.ai-flex-icon {
    font-size: 32px;
    margin-bottom: 6px;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.08));
}

.ai-flex-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--c-text);
    line-height: 1.4;
}

/* ============ CTA ============ */
.ai-cta {
    margin-bottom: 16px;
}

.ai-cta-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    width: 100%;
    background: linear-gradient(135deg, #25d366 0%, #128c7e 100%);
    color: #fff;
    border-radius: 60px;
    padding: 18px 22px;
    text-decoration: none;
    box-shadow: var(--shadow-green);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.ai-cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 40px rgba(37, 211, 102, 0.5);
}

.ai-cta-btn:active { transform: scale(0.98); }

.ai-cta-btn::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -100%;
    width: 60%;
    height: 200%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    transform: skewX(-20deg);
    animation: shine 3.2s infinite;
}

@keyframes shine {
    0% { left: -100%; }
    60%, 100% { left: 130%; }
}

.ai-cta-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.18);
    border-radius: 50%;
    flex-shrink: 0;
    backdrop-filter: blur(8px);
}

.ai-cta-text {
    display: flex;
    flex-direction: column;
    text-align: left;
    line-height: 1.2;
    flex: 1;
}

.ai-cta-text strong {
    font-size: 17px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.ai-cta-text em {
    font-size: 12px;
    font-style: normal;
    opacity: 0.92;
    margin-top: 3px;
    font-weight: 500;
}

.ai-cta-tap {
    font-size: 24px;
    animation: tapHint 1.4s ease-in-out infinite;
    flex-shrink: 0;
}

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

.ai-cta-hint {
    text-align: center;
    font-size: 13px;
    color: var(--c-text-2);
    margin-top: 14px;
    line-height: 1.6;
}

.ai-cta-hint b {
    color: var(--c-green-dark);
    background: linear-gradient(120deg, rgba(37, 211, 102, 0.12), transparent);
    padding: 1px 6px;
    border-radius: 4px;
    font-weight: 700;
}

/* ============ TRUST ============ */
.ai-trust {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 16px 18px;
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: 16px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
}

.ai-trust-item {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.ai-trust-ico {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-trust-text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.ai-trust-text strong {
    font-size: 12px;
    font-weight: 700;
    color: var(--c-text);
}

.ai-trust-text span {
    font-size: 10px;
    color: var(--c-text-2);
}

.ai-trust-divider {
    width: 1px;
    height: 32px;
    background: var(--c-border);
}

.ai-trust-free { justify-content: flex-end; }

.ai-trust-free .ai-trust-text { text-align: right; }

.ai-trust-pill {
    background: linear-gradient(135deg, #0f172a, #1e293b);
    color: #fff;
    font-weight: 800;
    font-size: 11px;
    letter-spacing: 1px;
    padding: 5px 10px;
    border-radius: 6px;
    flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(15, 23, 42, 0.25);
}

/* ============ SHARE ============ */
.ai-share { padding: 4px 0 20px; }

.ai-share .copy-link-btn {
    width: 100%;
    height: 48px;
    border-radius: 14px;
    font-weight: 600;
    background: #fff;
    border: 1.5px solid var(--c-border);
    color: var(--c-text);
    box-shadow: var(--shadow-sm);
}

.ai-share .copy-link-btn:hover {
    border-color: var(--c-primary);
    color: var(--c-primary);
}