@charset "utf-8";

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

:root {
    --tdv-bg: #111316;
    --tdv-panel: #181b20;
    --tdv-panel-2: #20242a;
    --tdv-text: #f7f3ee;
    --tdv-muted: #a9afb7;
    --tdv-line: rgba(255, 255, 255, 0.09);
    --tdv-coral: #ff6b5f;
    --tdv-coral-dark: #d94f45;
    --tdv-mint: #38c7a2;
    --tdv-gold: #f5b84b;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--tdv-bg);
    color: var(--tdv-text);
    line-height: 1.6;
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(135deg, rgba(255, 107, 95, 0.16), transparent 32%),
        linear-gradient(315deg, rgba(56, 199, 162, 0.12), transparent 38%);
    z-index: -1;
}

a {
    color: inherit;
}

.tdv-container {
    width: min(1160px, calc(100% - 40px));
    margin: 0 auto;
}

.tdv-navbar {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(17, 19, 22, 0.88);
    border-bottom: 1px solid var(--tdv-line);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.tdv-navbar .tdv-container {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.tdv-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.tdv-logo-mark {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--tdv-coral), var(--tdv-gold));
    color: #111316;
    font-size: 24px;
    box-shadow: 0 10px 24px rgba(255, 107, 95, 0.28);
}

.tdv-logo-text {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0;
}

.tdv-nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
    color: var(--tdv-muted);
    font-size: 15px;
}

.tdv-nav-links a {
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.tdv-btn {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.tdv-btn:hover {
    transform: translateY(-2px);
}

.tdv-btn-primary {
    background: var(--tdv-coral);
    color: #fff;
    box-shadow: 0 12px 28px rgba(255, 107, 95, 0.28);
}

.tdv-btn-primary:hover {
    background: var(--tdv-coral-dark);
}

.tdv-btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--tdv-line);
    color: var(--tdv-text);
}

.tdv-btn-light {
    background: #fff;
    color: #111316;
}

.tdv-btn-large {
    min-height: 50px;
    padding: 13px 22px;
}

.tdv-hero {
    position: relative;
    padding: 74px 0 88px;
    overflow: hidden;
}

.tdv-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
    align-items: center;
    gap: 64px;
}

.tdv-hero-copy h1 {
    max-width: 640px;
    font-size: clamp(42px, 6vw, 72px);
    line-height: 1.06;
    font-weight: 900;
    letter-spacing: 0;
    margin: 18px 0 22px;
}

.tdv-hero-copy p {
    max-width: 600px;
    color: var(--tdv-muted);
    font-size: 18px;
}

.tdv-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border: 1px solid rgba(56, 199, 162, 0.28);
    border-radius: 8px;
    background: rgba(56, 199, 162, 0.1);
    color: #9ee6d4;
    font-size: 14px;
    font-weight: 700;
}

.tdv-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 32px;
}

.tdv-hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    max-width: 620px;
    margin-top: 34px;
}

.tdv-hero-metrics div {
    padding: 18px;
    border: 1px solid var(--tdv-line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.04);
}

.tdv-hero-metrics strong,
.tdv-hero-metrics span {
    display: block;
}

.tdv-hero-metrics strong {
    font-size: 24px;
    line-height: 1.1;
}

.tdv-hero-metrics span {
    margin-top: 6px;
    color: var(--tdv-muted);
    font-size: 13px;
}

.tdv-phone-stage {
    min-height: 560px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px;
    border: 1px solid var(--tdv-line);
    border-radius: 8px;
    background:
        linear-gradient(160deg, rgba(255, 107, 95, 0.18), transparent 42%),
        linear-gradient(20deg, rgba(56, 199, 162, 0.14), transparent 45%),
        rgba(255, 255, 255, 0.04);
}

.tdv-phone {
    width: min(320px, 100%);
    padding: 16px;
    border: 10px solid #0b0c0e;
    border-radius: 28px;
    background: #15181d;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
}

.tdv-phone-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.tdv-phone-top span:first-child {
    width: 72px;
    height: 8px;
    border-radius: 999px;
    background: #2a2e35;
}

.tdv-phone-top span:last-child {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--tdv-mint);
}

.tdv-video-card {
    border-radius: 8px;
    background: var(--tdv-panel-2);
    overflow: hidden;
}

.tdv-video-card-main {
    padding: 12px;
}

.tdv-video-cover {
    height: 230px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    margin-bottom: 12px;
    background:
        linear-gradient(150deg, rgba(255, 255, 255, 0.18), transparent 30%),
        linear-gradient(135deg, var(--tdv-coral), #8748d4 48%, var(--tdv-mint));
    color: #fff;
    font-size: 52px;
}

.tdv-video-card b,
.tdv-video-card span,
.tdv-feed-item b,
.tdv-feed-item small {
    display: block;
}

.tdv-video-card span,
.tdv-feed-item small {
    color: var(--tdv-muted);
}

.tdv-feed-list {
    display: grid;
    gap: 10px;
    margin-top: 12px;
}

.tdv-feed-item {
    display: grid;
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    padding: 10px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
}

.tdv-feed-thumb {
    width: 54px;
    height: 54px;
    border-radius: 6px;
}

.tdv-feed-coral {
    background: var(--tdv-coral);
}

.tdv-feed-mint {
    background: var(--tdv-mint);
}

.tdv-feed-gold {
    background: var(--tdv-gold);
}

.tdv-section {
    padding: 86px 0;
}

.tdv-section-head {
    max-width: 680px;
    margin: 0 auto 38px;
    text-align: center;
}

.tdv-section-head-left {
    margin-left: 0;
    text-align: left;
}

.tdv-section-head span {
    display: inline-flex;
    margin-bottom: 10px;
    color: var(--tdv-mint);
    font-size: 14px;
    font-weight: 800;
}

.tdv-section-head h2 {
    font-size: clamp(30px, 4vw, 46px);
    line-height: 1.15;
    letter-spacing: 0;
}

.tdv-section-head p {
    margin-top: 14px;
    color: var(--tdv-muted);
    font-size: 16px;
}

.tdv-featured {
    background: #f5f1ea;
    color: #161719;
}

.tdv-featured .tdv-section-head p {
    color: #606873;
}

.tdv-feature-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.tdv-feature-card {
    min-height: 230px;
    padding: 24px;
    border: 1px solid rgba(17, 19, 22, 0.08);
    border-radius: 8px;
    background: #fff;
}

.tdv-feature-card i {
    width: 46px;
    height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    margin-bottom: 24px;
    background: #111316;
    color: var(--tdv-gold);
    font-size: 24px;
}

.tdv-feature-card h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.tdv-feature-card p {
    color: #606873;
    font-size: 15px;
}

.tdv-channels {
    background: var(--tdv-bg);
}

.tdv-channel-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.tdv-channel-card {
    min-height: 320px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 24px;
    border: 1px solid var(--tdv-line);
    border-radius: 8px;
    background:
        linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.44)),
        var(--tdv-panel);
}

.tdv-channel-card:nth-child(1) {
    background-color: #5b2d3a;
}

.tdv-channel-card:nth-child(2) {
    background-color: #204d47;
}

.tdv-channel-card:nth-child(3) {
    background-color: #5b4721;
}

.tdv-channel-icon {
    width: 52px;
    height: 52px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    margin-bottom: 18px;
    background: rgba(255, 255, 255, 0.14);
    font-size: 26px;
}

.tdv-channel-card h3 {
    font-size: 24px;
    margin-bottom: 8px;
}

.tdv-channel-card p {
    color: rgba(255, 255, 255, 0.76);
}

.tdv-download {
    background: #f5f1ea;
    color: #161719;
}

.tdv-download-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 56px;
    align-items: center;
}

.tdv-steps {
    display: grid;
    gap: 14px;
}

.tdv-step {
    display: grid;
    grid-template-columns: 70px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
    padding: 20px;
    border: 1px solid rgba(17, 19, 22, 0.08);
    border-radius: 8px;
    background: #fff;
}

.tdv-step b {
    color: var(--tdv-coral);
    font-size: 26px;
    line-height: 1;
}

.tdv-step h3 {
    font-size: 20px;
    margin-bottom: 4px;
}

.tdv-step p {
    color: #606873;
}

.tdv-download-card {
    padding: 34px;
    border-radius: 8px;
    background: #111316;
    color: #fff;
}

.tdv-download-card > i {
    width: 58px;
    height: 58px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--tdv-coral);
    font-size: 30px;
    margin-bottom: 42px;
}

.tdv-download-card h2 {
    font-size: 34px;
    line-height: 1.15;
}

.tdv-download-card p {
    margin: 12px 0 26px;
    color: var(--tdv-muted);
}

.tdv-final-cta {
    padding: 78px 0;
    text-align: center;
    background:
        linear-gradient(135deg, rgba(255, 107, 95, 0.16), rgba(56, 199, 162, 0.12)),
        #15181d;
}

.tdv-final-cta h2 {
    max-width: 760px;
    margin: 0 auto;
    font-size: clamp(30px, 4vw, 48px);
    line-height: 1.18;
}

.tdv-final-cta p {
    margin: 14px 0 26px;
    color: var(--tdv-muted);
}

.tdv-footer {
    position: relative;
    padding: 30px 0;
    border-top: 1px solid var(--tdv-line);
    background: #0d0f11;
    color: var(--tdv-muted);
}

.tdv-footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    font-size: 14px;
}

@media (max-width: 960px) {
    .tdv-hero-grid,
    .tdv-download-grid {
        grid-template-columns: 1fr;
    }

    .tdv-phone-stage {
        min-height: auto;
    }

    .tdv-feature-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .tdv-channel-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .tdv-container {
        width: min(100% - 28px, 1160px);
    }

    .tdv-navbar .tdv-container {
        min-height: 64px;
    }

    .tdv-nav-links {
        display: none;
    }

    .tdv-navbar .tdv-btn {
        padding-inline: 12px;
        font-size: 14px;
    }

    .tdv-hero {
        padding: 48px 0 60px;
    }

    .tdv-hero-grid {
        gap: 34px;
    }

    .tdv-hero-copy p {
        font-size: 16px;
    }

    .tdv-hero-actions,
    .tdv-hero-actions .tdv-btn {
        width: 100%;
    }

    .tdv-hero-metrics {
        grid-template-columns: 1fr;
    }

    .tdv-phone-stage {
        padding: 16px;
    }

    .tdv-section {
        padding: 58px 0;
    }

    .tdv-section-head,
    .tdv-section-head-left {
        text-align: left;
    }

    .tdv-feature-grid {
        grid-template-columns: 1fr;
    }

    .tdv-feature-card {
        min-height: auto;
    }

    .tdv-step {
        grid-template-columns: 50px minmax(0, 1fr);
    }

    .tdv-footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 420px) {
    .tdv-logo-text {
        font-size: 19px;
    }

    .tdv-navbar .tdv-btn i {
        display: none;
    }

    .tdv-phone {
        border-width: 7px;
        border-radius: 22px;
    }

    .tdv-video-cover {
        height: 190px;
    }
}