/*
 * 吾爱Nova浏览器 · 官网样式
 *
 * 配色以蓝、绿为主，与 App 端的令牌同源（android-app .../values/colors.xml）：
 *   品牌蓝  #3D6BFF   brand / brand-strong
 *   青绿    #00B8A2   accent（图标与主按钮渐变的终点色）
 *   鲜绿    #22C55E   语义强调，只在需要「增长 / 省流量」这类正反馈时出现
 *
 * 三者来自同一套品牌系统，官网不另起炉灶 —— 用户从官网点进 App，
 * 看到的应当是同一种颜色，而不是两套设计各说各话。
 */

:root {
    /* 品牌色。与 App 端 colors.xml 逐条对应 */
    --brand: #3D6BFF;
    --brand-strong: #2E56D9;
    --brand-soft: rgba(61, 107, 255, 0.10);
    --accent: #00B8A2;
    --accent-strong: #00937F;
    --accent-soft: rgba(0, 184, 162, 0.10);
    --green: #22C55E;
    --green-soft: rgba(34, 197, 94, 0.12);

    /* 语义色 */
    --ok: #14B87A;
    --warn: #FF9F0A;
    --danger: #FF4D4F;

    /* 中性色 */
    --bg: #F5F8FC;
    --surface: #FFFFFF;
    --surface-2: #EEF3FA;
    --border: #E2E9F3;
    --border-strong: #CFDAEA;
    --text: #101728;
    --text-2: #45516B;
    --text-3: #6E7B94;

    /* 品牌渐变：蓝入青绿出，与 App 图标、主按钮同一走向 */
    --grad-brand: linear-gradient(135deg, #5B84FF, #3D6BFF 46%, #00B8A2);
    --grad-text: linear-gradient(100deg, #3D6BFF 20%, #00B8A2 85%);

    --r-md: 12px;
    --r-lg: 16px;
    --r-xl: 24px;
    --shadow-sm: 0 1px 2px rgba(16, 23, 40, 0.06);
    --shadow-md: 0 6px 20px rgba(16, 23, 40, 0.08);
    --shadow-lg: 0 24px 60px rgba(35, 64, 150, 0.16);
    --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
    --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */

.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-in {
    max-width: 1120px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    gap: 28px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-weight: 700;
    font-size: 17px;
    letter-spacing: 0.2px;
}

.logo img {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.logo small {
    font-weight: 500;
    color: var(--text-3);
    font-size: 12px;
    margin-left: 2px;
}

.nav-links {
    margin-left: auto;
    display: flex;
    gap: 22px;
    font-size: 14.5px;
}

.nav-links a { color: var(--text-2); transition: color 0.15s; }
.nav-links a:hover { color: var(--brand); }

/* ---------- 按钮 ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
    border: none;
}

.btn-primary {
    background: var(--grad-brand);
    color: #fff;
    box-shadow: 0 4px 14px rgba(61, 107, 255, 0.32);
}

.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 22px rgba(61, 107, 255, 0.4); }

.btn-ghost {
    background: var(--surface);
    color: var(--text-2);
    border: 1px solid var(--border-strong);
}

.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }

.btn-lg { padding: 13px 26px; font-size: 16px; border-radius: 12px; }

/* ---------- Hero ---------- */

.hero {
    position: relative;
    overflow: hidden;
    padding: 84px 0 72px;
    background:
        radial-gradient(720px 340px at 12% -6%, rgba(61, 107, 255, 0.12), transparent 65%),
        radial-gradient(680px 360px at 92% 8%, rgba(0, 184, 162, 0.13), transparent 62%),
        linear-gradient(180deg, #FBFDFF 0%, var(--bg) 100%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 48px;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-2);
    font-size: 13.5px;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.eyebrow i {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--grad-brand);
}

.hero h1 {
    margin: 22px 0 18px;
    font-size: clamp(34px, 5vw, 52px);
    line-height: 1.22;
    letter-spacing: -0.5px;
    font-weight: 800;
}

.hero h1 em {
    font-style: normal;
    background: var(--grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.lede {
    font-size: 17.5px;
    color: var(--text-2);
    max-width: 34em;
}

.lede b { color: var(--text); }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 22px;
    margin-top: 26px;
    font-size: 13.5px;
    color: var(--text-3);
}

.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }

.hero-meta i {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--accent);
}

/* ---------- 手机 mockup（宣传图，纯 CSS 绘制） ---------- */

.stage {
    display: flex;
    justify-content: center;
    perspective: 1400px;
}

.phone {
    width: 262px;
    height: 536px;
    border-radius: 38px;
    background: #0F1730;
    padding: 9px;
    box-shadow: var(--shadow-lg), 0 2px 0 rgba(255,255,255,0.35) inset;
    transform: rotate(-2.5deg);
    transition: transform 0.35s ease;
}

.phone:hover { transform: rotate(0deg) translateY(-6px); }

.screen {
    width: 100%;
    height: 100%;
    border-radius: 30px;
    background: var(--bg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    font-size: 11px;
}

/* 状态栏 */
.sbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 9px 16px 5px;
    color: var(--text-3);
    font-size: 9.5px;
    font-weight: 600;
}

.sbar b { color: var(--text); }

/* 地址栏 */
.addr {
    margin: 4px 12px 8px;
    padding: 8px 13px;
    border-radius: 999px;
    background: var(--surface);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-2);
    font-size: 11px;
    box-shadow: var(--shadow-sm);
}

.addr .lock { color: var(--ok); font-size: 9px; }

.addr .go {
    margin-left: auto;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: var(--grad-brand);
    color: #fff;
    display: grid;
    place-items: center;
    font-size: 9px;
}

/* 屏幕主体 */
.sbody { flex: 1; padding: 0 12px; overflow: hidden; }

/* 新标签页 */
.ntp-hero {
    text-align: center;
    padding: 20px 0 14px;
}

.ntp-hero img {
    width: 52px; height: 52px;
    margin: 0 auto 8px;
    border-radius: 13px;
    box-shadow: var(--shadow-md);
}

.ntp-hero p { color: var(--text-3); font-size: 10px; }

.quicks {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px 6px;
    padding: 6px 2px 12px;
}

.qk { text-align: center; }

.qk i {
    display: grid;
    place-items: center;
    width: 40px; height: 40px;
    margin: 0 auto 5px;
    border-radius: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    font-style: normal;
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.qk span { color: var(--text-3); font-size: 9px; }

/* 底栏工具条 */
.tbar {
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 8px 10px 13px;
    background: var(--surface);
    border-top: 1px solid var(--border);
}

.tbar .tb {
    width: 26px; height: 26px;
    display: grid;
    place-items: center;
    color: var(--text-3);
    font-size: 12px;
}

.tbar .tb.tabs {
    border-radius: 8px;
    background: var(--grad-brand);
    color: #fff;
    font-size: 10.5px;
    font-weight: 700;
    box-shadow: 0 3px 9px rgba(61, 107, 255, 0.35);
}

/* 通用屏块 */
.p-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding: 8px 2px 10px;
}

.p-head b { font-size: 15px; }

.p-head span { color: var(--text-3); font-size: 9.5px; }

.card-s {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 13px;
    padding: 11px 12px;
    margin-bottom: 9px;
    box-shadow: var(--shadow-sm);
}

.row-s {
    display: flex;
    align-items: center;
    gap: 9px;
}

.row-s .ic {
    width: 30px; height: 30px;
    border-radius: 9px;
    display: grid;
    place-items: center;
    font-style: normal;
    font-size: 12px;
    color: #fff;
    flex: none;
}

.row-s .meta { flex: 1; min-width: 0; }

.row-s .meta b {
    display: block;
    font-size: 11px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.row-s .meta span { color: var(--text-3); font-size: 9.5px; }

/* 进度条：品牌渐变 */
.prog {
    height: 5px;
    border-radius: 999px;
    background: var(--surface-2);
    margin-top: 8px;
    overflow: hidden;
}

.prog i {
    display: block;
    height: 100%;
    border-radius: 999px;
    background: var(--grad-brand);
}

/* 开关 */
.sw2 {
    width: 30px; height: 18px;
    border-radius: 999px;
    background: var(--border-strong);
    position: relative;
    flex: none;
}

.sw2::after {
    content: "";
    position: absolute;
    top: 2px; left: 2px;
    width: 14px; height: 14px;
    border-radius: 50%;
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.sw2.on { background: var(--accent); }
.sw2.on::after { left: auto; right: 2px; }

/* 大数字统计 */
.stat-big {
    text-align: center;
    padding: 14px 0 10px;
}

.stat-big b {
    font-size: 27px;
    font-weight: 800;
    background: var(--grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.5px;
}

.stat-big span { display: block; color: var(--text-3); font-size: 10px; }

/* 分段选择器 */
.seg {
    display: flex;
    background: var(--surface-2);
    border-radius: 10px;
    padding: 3px;
    margin-bottom: 10px;
}

.seg span {
    flex: 1;
    text-align: center;
    padding: 6px 0;
    border-radius: 8px;
    color: var(--text-3);
    font-size: 10px;
}

.seg .on {
    background: var(--surface);
    color: var(--text);
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

/* 屏幕底部说明 */
.cap {
    text-align: center;
    margin-top: 16px;
}

.cap b { display: block; font-size: 15px; }

.cap span { color: var(--text-3); font-size: 13px; }

/* ---------- 通用区块 ---------- */

.section { padding: 76px 0; }

.section.tint {
    background: linear-gradient(180deg, #FBFDFF, #F2F8F7);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.sec-head { max-width: 620px; margin-bottom: 40px; }

.sec-head .kicker {
    color: var(--accent-strong);
    font-weight: 700;
    font-size: 13.5px;
    letter-spacing: 2px;
}

.sec-head h2 {
    font-size: clamp(26px, 3.4vw, 36px);
    letter-spacing: -0.4px;
    margin: 8px 0 10px;
    font-weight: 800;
}

.sec-head p { color: var(--text-2); font-size: 16px; }

/* 特性网格 */
.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.card .fico {
    width: 42px; height: 42px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    margin-bottom: 14px;
    font-size: 18px;
    color: #fff;
    background: var(--grad-brand);
}

.card .fico.g { background: linear-gradient(135deg, #34D399, #00B8A2); }

.card h3 { font-size: 16.5px; margin-bottom: 6px; }

.card p { color: var(--text-2); font-size: 14px; }

.card p code {
    font-family: var(--mono);
    font-size: 12.5px;
    background: var(--surface-2);
    padding: 1px 6px;
    border-radius: 6px;
}

/* 宣传图区：多台手机横向排布 */
.shots {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 26px 18px;
    align-items: start;
}

.shot { text-align: center; }

.shot .phone {
    width: 100%;
    max-width: 240px;
    height: auto;
    aspect-ratio: 262 / 536;
    margin: 0 auto;
    transform: none;
}

.shot .phone:hover { transform: translateY(-6px); }

/* 诚实条款 */
.honest {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.honest .card h3 { display: flex; align-items: center; gap: 9px; }

.honest .tag {
    font-size: 11.5px;
    font-weight: 700;
    padding: 2px 9px;
    border-radius: 999px;
}

.honest .tag.t {
    background: var(--accent-soft);
    color: var(--accent-strong);
}

.honest .tag.b {
    background: var(--brand-soft);
    color: var(--brand);
}

/* ---------- 下载区 ---------- */

.dl-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    padding: 34px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.dl-box::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 4px;
    background: var(--grad-brand);
}

.dl-version { display: flex; align-items: baseline; gap: 12px; }

.dl-version strong {
    font-size: 26px;
    background: var(--grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.dl-version span { color: var(--text-3); font-size: 13.5px; }

.dl-note { color: var(--text-2); margin: 10px 0 20px; font-size: 14.5px; }

.dl-list { display: flex; flex-wrap: wrap; gap: 12px; }

.dl-facts {
    list-style: none;
    margin-top: 22px;
    border-top: 1px dashed var(--border);
    padding-top: 16px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.dl-facts li {
    display: flex;
    justify-content: space-between;
    font-size: 13.5px;
    color: var(--text-3);
}

.dl-facts li span:last-child { color: var(--text); font-weight: 600; }

/* ---------- 页脚 ---------- */

footer {
    border-top: 1px solid var(--border);
    padding: 36px 0 44px;
    color: var(--text-3);
    font-size: 13.5px;
}

.foot-in {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 30px;
    align-items: center;
}

.foot-in img { width: 26px; height: 26px; border-radius: 7px; }

.foot-links { margin-left: auto; display: flex; gap: 20px; }

.foot-links a { color: var(--text-2); }
.foot-links a:hover { color: var(--brand); }

/* ---------- 响应式 ---------- */

@media (max-width: 960px) {
    .hero-grid { grid-template-columns: 1fr; }
    .stage { margin-top: 10px; }
    .grid { grid-template-columns: repeat(2, 1fr); }
    .shots { grid-template-columns: repeat(2, 1fr); }
    .honest { grid-template-columns: 1fr; }
    .nav-links { display: none; }
}

@media (max-width: 560px) {
    .grid { grid-template-columns: 1fr; }
    .shots { grid-template-columns: 1fr; }
    .dl-facts { grid-template-columns: 1fr; }
    .hero { padding: 56px 0 52px; }
    .section { padding: 56px 0; }
}