/* ============================================================
   星宝阁 · 落地页样式
   设计基调：深空蓝底 + 蓝橙渐变辉光 + 玻璃拟态卡片
   ============================================================ */

/* ---------- 0. 设计变量 ---------- */
:root {
    --c-primary:       #2F7CF6;
    --c-primary-light: #5B9CFF;
    --c-primary-dark:  #1E5DDC;
    --c-soft:          #E8F1FF;
    --c-accent:        #FF9F2E;
    --c-success:       #27C46B;

    --bg:       #070C24;
    --bg-elev:  #0E1538;
    --bg-glass: rgba(20, 30, 70, 0.55);
    --line:      rgba(120, 160, 255, 0.12);
    --line-soft: rgba(120, 160, 255, 0.06);
    --ink:   #F2F4FB;
    --ink-2: #CCD2E6;
    --ink-3: #909AB8;

    --shadow-md:   0 12px 36px rgba(7, 18, 50, 0.45);
    --shadow-glow: 0 18px 50px rgba(47, 124, 246, 0.32);

    --r-sm: 10px;
    --r-md: 16px;
    --r-lg: 24px;
    --r-xl: 32px;

    --pad-x: clamp(20px, 6vw, 96px);
    --easing: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 1. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; border: 0; background: none; padding: 0; -webkit-appearance: none; appearance: none; -webkit-tap-highlight-color: transparent; }
a { text-decoration: none; color: inherit; -webkit-tap-highlight-color: transparent; }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; }
p { margin: 0; }

body {
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
}

::selection { background: var(--c-primary); color: #fff; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(91, 156, 255, 0.35); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-primary); }
:focus-visible { outline: 2px solid var(--c-primary-light); outline-offset: 3px; border-radius: 6px; }

/* ---------- 2. 背景装饰 ---------- */
.bg-decor {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}
.aurora {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.55;
    will-change: transform;
}
.aurora--a {
    width: 620px; height: 620px;
    top: -180px; left: -160px;
    background: radial-gradient(circle, var(--c-primary) 0%, transparent 70%);
    animation: drift-a 22s ease-in-out infinite alternate;
}
.aurora--b {
    width: 520px; height: 520px;
    top: 30vh; right: -120px;
    background: radial-gradient(circle, var(--c-accent) 0%, transparent 70%);
    opacity: 0.40;
    animation: drift-b 26s ease-in-out infinite alternate;
}
.aurora--c {
    width: 720px; height: 720px;
    bottom: -260px; left: 30vw;
    background: radial-gradient(circle, #6B5BFF 0%, transparent 70%);
    opacity: 0.32;
    animation: drift-c 30s ease-in-out infinite alternate;
}
@keyframes drift-a { from { transform: translate(0,0) scale(1); }      to { transform: translate(140px, 80px) scale(1.15); } }
@keyframes drift-b { from { transform: translate(0,0) scale(1); }      to { transform: translate(-180px, 120px) scale(0.92); } }
@keyframes drift-c { from { transform: translate(0,0) scale(1); }      to { transform: translate(120px, -80px) scale(1.08); } }

.grid-mask {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(120, 160, 255, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(120, 160, 255, 0.045) 1px, transparent 1px);
    background-size: 56px 56px;
    -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 75%);
            mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 75%);
}

/* ---------- 3. 顶部导航 ---------- */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px var(--pad-x);
    border-bottom: 1px solid transparent;
    transition: background .3s ease, backdrop-filter .3s ease, padding .3s ease, border-color .3s ease;
}
.nav.is-stuck {
    background: rgba(7, 12, 36, 0.72);
    backdrop-filter: saturate(180%) blur(18px);
    -webkit-backdrop-filter: saturate(180%) blur(18px);
    padding: 12px var(--pad-x);
    border-bottom-color: var(--line);
}

.nav__brand { display: flex; align-items: center; gap: 14px; font-weight: 700; }
.nav__brand-mark { width: 36px; height: 36px; flex-shrink: 0; display: inline-flex; transition: transform .5s var(--easing); }
.nav__brand:hover .nav__brand-mark { transform: rotate(-6deg) scale(1.06); }
.nav__brand-mark svg { width: 100%; height: 100%; overflow: visible; }
.nav__brand-mark .lm-bg { filter: drop-shadow(0 6px 14px rgba(47, 124, 246, 0.4)); transition: filter .4s ease; }
.nav__brand-mark .lm-pill { fill: rgba(255,255,255,0.92); transform-box: fill-box; transform-origin: center; transition: transform .5s var(--easing); }
.nav__brand-mark .lm-pill--back { fill: rgba(255,255,255,0.55); }
.nav__brand-mark .lm-arc { fill: rgba(91,156,255,0.55); opacity: .85; }
.nav__brand-mark .lm-shine { animation: lm-shine 4s ease-in-out 1.5s infinite; transform-box: fill-box; }
@keyframes lm-shine {
    0%   { transform: translateY(0);    opacity: 0; }
    8%   { opacity: 1; }
    50%  { transform: translateY(70px); opacity: 1; }
    60%  { opacity: 0; }
    100% { transform: translateY(70px); opacity: 0; }
}
.nav__brand-text { font-size: 18px; letter-spacing: 1px; }

.nav__menu { display: flex; align-items: center; gap: 34px; }
.nav__menu a { font-size: 15px; color: var(--ink-2); transition: color .25s ease; position: relative; }
.nav__menu a:hover { color: var(--ink); }
.nav__menu a.active { color: var(--ink); }
.nav__menu a.active::after {
    content: "";
    position: absolute;
    left: 50%; bottom: -7px;
    width: 18px; height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--c-primary-light), var(--c-accent));
    transform: translateX(-50%);
}
.nav__cta {
    padding: 9px 22px;
    border-radius: 99px;
    color: #fff !important;
    font-weight: 600;
    background: linear-gradient(135deg, var(--c-primary-light), var(--c-primary));
    box-shadow: 0 8px 22px rgba(47, 124, 246, 0.35);
    transition: transform .3s var(--easing), box-shadow .3s ease;
}
.nav__cta:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(47, 124, 246, 0.5); }
.nav__menu a.nav__cta.active::after { display: none; }

/* 汉堡按钮 */
.nav__toggle { display: none; width: 40px; height: 40px; position: relative; }
.nav__toggle span {
    position: absolute;
    left: 8px;
    width: 24px; height: 2px;
    border-radius: 2px;
    background: var(--ink);
    transition: transform .35s var(--easing), opacity .25s ease;
}
.nav__toggle span:nth-child(1) { top: 13px; }
.nav__toggle span:nth-child(2) { top: 19px; }
.nav__toggle span:nth-child(3) { top: 25px; }
.nav__toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 4. 首屏 Hero ---------- */
.hero { position: relative; padding: 160px var(--pad-x) 60px; }
.hero__inner {
    max-width: 1240px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 64px;
    align-items: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px 6px 10px;
    background: rgba(91, 156, 255, 0.12);
    border: 1px solid rgba(91, 156, 255, 0.28);
    border-radius: 99px;
    font-size: 12.5px;
    letter-spacing: .5px;
    color: #B5CDFF;
    margin-bottom: 28px;
}
.badge__dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--c-primary-light);
    box-shadow: 0 0 0 4px rgba(91, 156, 255, 0.18);
    animation: pulse-blue 1.6s ease-in-out infinite;
}
@keyframes pulse-blue {
    0%, 100% { box-shadow: 0 0 0 4px rgba(91, 156, 255, 0.18); }
    50%      { box-shadow: 0 0 0 8px rgba(91, 156, 255, 0.05); }
}

.hero__title {
    font-size: clamp(40px, 5.6vw, 72px);
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 24px;
}
.hero__title em {
    font-style: normal;
    background: linear-gradient(135deg, var(--c-primary-light) 0%, var(--c-primary) 50%, var(--c-accent) 100%);
    -webkit-background-clip: text;
            background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.type-line { display: block; white-space: pre-wrap; line-height: 1.15; min-height: 1.15em; }
.type-cursor {
    display: inline-block;
    width: 4px;
    height: .92em;
    margin-left: 6px;
    vertical-align: -10%;
    background: linear-gradient(180deg, var(--c-primary-light), var(--c-primary));
    border-radius: 2px;
    box-shadow: 0 0 12px rgba(91, 156, 255, 0.6);
    opacity: 0;
    transition: opacity .2s ease;
    animation: caret-blink .85s steps(2) infinite;
}
.type-cursor.is-active { opacity: 1; }
.type-cursor.is-done { animation: caret-blink .85s steps(2) 4, caret-fade .6s 3.4s forwards; }
@keyframes caret-blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
@keyframes caret-fade { to { opacity: 0; } }

.hero__lede {
    font-size: clamp(15px, 1.4vw, 17px);
    color: var(--ink-2);
    margin-bottom: 36px;
    max-width: 460px;
    line-height: 1.7;
}
.hero__actions { display: flex; gap: 14px; margin-bottom: 56px; flex-wrap: wrap; }

.hero__stats {
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: 40px;
    padding-top: 28px;
    border-top: 1px solid var(--line-soft);
    max-width: 480px;
}
.hero__stats li { display: flex; flex-direction: column; gap: 4px; }
.hero__stats strong {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, #fff, var(--c-primary-light));
    -webkit-background-clip: text;
            background-clip: text;
    -webkit-text-fill-color: transparent;
    font-variant-numeric: tabular-nums;
}
.hero__stats small { font-size: 12px; color: var(--ink-3); letter-spacing: 1px; }

/* 手机模型 */
.hero__visual {
    position: relative;
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero__visual::before {
    content: "";
    position: absolute;
    bottom: 8%; left: 50%;
    transform: translateX(-50%);
    width: 80%; height: 50%;
    background: radial-gradient(ellipse at 50% 100%,
        rgba(47, 124, 246, 0.35) 0%,
        rgba(91, 156, 255, 0.18) 30%,
        transparent 65%);
    filter: blur(30px);
    pointer-events: none;
    z-index: 0;
}
.phone {
    position: relative;
    width: min(78%, 320px);
    transform: rotate(-2deg);
    animation: phone-float 7s ease-in-out infinite;
    z-index: 1;
}
.phone::after {
    content: "";
    position: absolute;
    bottom: -8%; left: 6%; right: 6%;
    height: 14%;
    background: radial-gradient(ellipse at 50% 0%, rgba(91, 156, 255, 0.30) 0%, transparent 60%);
    filter: blur(6px);
    border-radius: 50%;
    pointer-events: none;
    z-index: -1;
}
@keyframes phone-float {
    0%, 100% { transform: rotate(-2deg) translateY(0); }
    50%      { transform: rotate(-2deg) translateY(-10px); }
}
.phone__screen { position: relative; width: 100%; height: auto; }
.phone__screen img {
    display: block;
    width: 100%; height: auto;
    object-fit: contain;
    object-position: center;
    border-radius: 28px;
    box-shadow: 0 0 0 1px rgba(91, 156, 255, 0.18), 0 18px 48px rgba(7, 18, 50, 0.55);
}
.phone__notch { display: none; }

/* 环绕光点 */
.orbit-dot {
    position: absolute;
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--c-primary-light);
    box-shadow: 0 0 16px rgba(91, 156, 255, 0.9);
    pointer-events: none;
    animation: orbit-float 5s ease-in-out infinite;
}
.orbit-dot--1 { top: 12%;  right: 6%;  background: var(--c-accent); box-shadow: 0 0 16px rgba(255,159,46,.9); animation-delay: 0s; }
.orbit-dot--2 { bottom: 18%; left: 2%;  width: 7px; height: 7px;  animation-delay: 1.2s; }
.orbit-dot--3 { top: 46%;  right: -2%; width: 6px; height: 6px;  animation-delay: 2.4s; }
@keyframes orbit-float {
    0%, 100% { transform: translateY(0) scale(1);    opacity: .85; }
    50%      { transform: translateY(-14px) scale(1.25); opacity: 1; }
}

.hero__scroll {
    display: block;
    width: 24px; height: 40px;
    margin: 40px auto 0;
    border: 1.5px solid rgba(120, 160, 255, 0.3);
    border-radius: 99px;
    position: relative;
}
.hero__scroll span {
    position: absolute;
    left: 50%; top: 8px;
    transform: translateX(-50%);
    width: 3px; height: 7px;
    border-radius: 2px;
    background: var(--c-primary-light);
    animation: scroll-hint 1.8s ease-in-out infinite;
}
@keyframes scroll-hint {
    0%   { transform: translate(-50%, 0);    opacity: 0; }
    30%  { opacity: 1; }
    100% { transform: translate(-50%, 16px); opacity: 0; }
}

/* ---------- 5. 按钮 ---------- */
.btn {
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 15px 28px;
    border-radius: 99px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: .3px;
    transition: transform .3s var(--easing), box-shadow .3s ease, background .3s ease, border-color .3s ease;
    -webkit-tap-highlight-color: transparent;
}
.btn svg { width: 18px; height: 18px; }
.btn--primary {
    color: #fff;
    background: linear-gradient(135deg, var(--c-primary-light), var(--c-primary));
    box-shadow: 0 14px 34px rgba(47, 124, 246, 0.4);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 20px 44px rgba(47, 124, 246, 0.55); }
.btn--primary:active { transform: translateY(0); filter: brightness(.94); }
.btn--ghost {
    color: var(--ink);
    background: rgba(120, 160, 255, 0.07);
    border: 1px solid rgba(120, 160, 255, 0.22);
}
.btn--ghost:hover { transform: translateY(-3px); background: rgba(120, 160, 255, 0.13); border-color: rgba(120, 160, 255, 0.4); }
.btn--lg { padding: 18px 36px; font-size: 16px; }

.ripple-wave {
    position: absolute;
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    background: rgba(255, 255, 255, 0.35);
    pointer-events: none;
    animation: ripple-out .6s ease-out forwards;
}
.ripple-wave--echo { background: rgba(255, 255, 255, 0.18); animation-duration: .9s; }
@keyframes ripple-out { to { transform: translate(-50%, -50%) scale(1); opacity: 0; } }

/* ---------- 6. 区块标题 ---------- */
.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-title { font-size: clamp(28px, 3.6vw, 42px); line-height: 1.25; letter-spacing: -.5px; margin-bottom: 14px; }
.section-title em {
    font-style: normal;
    background: linear-gradient(135deg, var(--c-primary-light), var(--c-accent));
    -webkit-background-clip: text;
            background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.section-lede { font-size: 15px; color: var(--ink-2); }

/* ---------- 7. 功能卡片 Bento ---------- */
.feature { padding: 80px var(--pad-x); position: relative; }
.feature__grid {
    max-width: 1240px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    grid-auto-flow: row dense;
    gap: 20px;
}

.f-card {
    position: relative;
    overflow: hidden;
    grid-column: span 2;
    padding: 28px;
    background: var(--bg-glass);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    transition: transform .35s var(--easing), border-color .35s ease, box-shadow .35s ease;
}
.f-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(600px at var(--mx, 50%) var(--my, 0%), rgba(91, 156, 255, 0.10), transparent 60%);
    opacity: 0;
    transition: opacity .35s ease;
    pointer-events: none;
}
.f-card:hover { transform: translateY(-6px); border-color: rgba(91, 156, 255, 0.35); box-shadow: var(--shadow-md); }
.f-card:hover::before { opacity: 1; }

.f-card--lg {
    grid-column: span 3;
    grid-row: span 2;
    padding: 0;
    display: flex;
    flex-direction: column;
}
.f-card--feat { grid-column: span 3; transform-style: preserve-3d; }
.f-card--wide { grid-column: span 6; display: flex; align-items: center; gap: 28px; }
.f-card--wide .f-card__body { flex: 1; }

/* 大卡配图 */
.f-card__media { position: relative; overflow: hidden; flex: 1; min-height: 220px; }
.f-card__media--cover { border-radius: var(--r-lg) var(--r-lg) 0 0; }
.f-card__media img { width: 100%; height: 100%; object-fit: cover; object-position: top center; transition: transform .6s var(--easing); }
.f-card--lg:hover .f-card__media img { transform: scale(1.05); }
.f-card__chip {
    position: absolute;
    top: 16px; left: 16px;
    z-index: 2;
    padding: 5px 14px;
    border-radius: 99px;
    font-size: 12px;
    color: #fff;
    background: rgba(7, 12, 36, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(120, 160, 255, 0.25);
}

.f-card__body { padding: 24px 28px 28px; }
.f-card--wide .f-card__body { padding: 0; }

.f-card__icon-wrap {
    width: 46px; height: 46px;
    border-radius: var(--r-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    color: var(--c-primary-light);
    background: rgba(91, 156, 255, 0.12);
    border: 1px solid rgba(91, 156, 255, 0.24);
}
.f-card__icon-wrap--sm { width: 38px; height: 38px; border-radius: 12px; margin-bottom: 14px; }
.f-card__icon-wrap svg { width: 22px; height: 22px; }
.f-card__icon-wrap--sm svg { width: 18px; height: 18px; }
.f-card__icon-wrap[data-color="accent"]  { color: var(--c-accent);  background: rgba(255, 159, 46, 0.12); border-color: rgba(255, 159, 46, 0.26); }
.f-card__icon-wrap[data-color="success"] { color: var(--c-success); background: rgba(39, 196, 107, 0.12); border-color: rgba(39, 196, 107, 0.26); }

.f-card h3 { font-size: 19px; margin-bottom: 10px; letter-spacing: .2px; }
.f-card h3 em { font-style: normal; color: var(--c-primary-light); }
.f-card p { font-size: 14px; color: var(--ink-2); line-height: 1.75; }

/* API 卡指标 */
.f-card__metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    flex-shrink: 0;
    padding-left: 32px;
    border-left: 1px solid var(--line-soft);
    min-width: 240px;
}
.f-card__metrics strong {
    display: block;
    font-size: 30px;
    font-weight: 700;
    background: linear-gradient(135deg, #fff, var(--c-primary-light));
    -webkit-background-clip: text;
            background-clip: text;
    -webkit-text-fill-color: transparent;
    font-variant-numeric: tabular-nums;
}
.f-card__metrics small { font-size: 12px; color: var(--ink-3); letter-spacing: .3px; }

/* 滚动入场 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--easing), transform .7s var(--easing); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 8. 界面展示 ---------- */
.showcase {
    position: relative;
    padding: 80px 0 90px;
    overflow: hidden;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
            mask-image: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
}
.showcase .section-head { padding: 0 var(--pad-x); margin-bottom: 24px; position: relative; z-index: 2; }
.showcase__track { position: relative; width: 100%; z-index: 1; }

.showcase__waveline {
    position: absolute;
    top: 75px; bottom: 75px;
    left: 0; width: 100%;
    pointer-events: none;
    z-index: 0;
}
.showcase__waveline svg { width: 100%; height: 100%; display: block; overflow: visible; }
.wave-path { will-change: d; }
.wave-path--1 { filter: drop-shadow(0 0 14px rgba(91,156,255,.7)) drop-shadow(0 0 5px rgba(91,156,255,.55)); }
.wave-path--2 { filter: drop-shadow(0 0 10px rgba(255,159,46,.5)); opacity: .85; }
.wave-path--3 { filter: drop-shadow(0 0 7px rgba(91,156,255,.35));  opacity: .55; }

.showcase__row { position: relative; z-index: 1; display: flex; gap: 28px; width: max-content; padding: 75px 0; }

.shot {
    --shot-y: 0px;
    --offset-y: 0px;
    --offset-rot: 0deg;
    --offset-scale: 1;
    position: relative;
    width: clamp(190px, 22vw, 256px);
    aspect-ratio: 9 / 19;
    flex-shrink: 0;
    margin: 0;
    padding: 8px;
    background: linear-gradient(160deg, #1A2557 0%, #0E1538 100%);
    border-radius: 28px;
    box-shadow:
        0 0 0 1px rgba(91, 156, 255, 0.18),
        inset 0 0 0 1px rgba(255, 255, 255, 0.05),
        0 18px 40px rgba(7, 18, 50, 0.50);
    transform: translateY(calc(var(--shot-y) + var(--offset-y))) rotate(var(--offset-rot)) scale(var(--offset-scale));
    transition: transform .4s var(--easing), box-shadow .5s ease;
    will-change: transform;
}
.shot:nth-child(6n+1) { --offset-y: -22px; --offset-rot: -3.5deg; --offset-scale: .95; }
.shot:nth-child(6n+2) { --offset-y:  18px; --offset-rot:  2.8deg; --offset-scale: 1.02; }
.shot:nth-child(6n+3) { --offset-y: -10px; --offset-rot:  4.5deg; --offset-scale: .92; }
.shot:nth-child(6n+4) { --offset-y:  28px; --offset-rot: -2.5deg; --offset-scale: 1.05; }
.shot:nth-child(6n+5) { --offset-y: -30px; --offset-rot:  3.2deg; --offset-scale: .98; }
.shot:nth-child(6n)   { --offset-y:  10px; --offset-rot: -4deg;   --offset-scale: 1; }
.shot__screen { width: 100%; height: 100%; border-radius: 22px; overflow: hidden; position: relative; }
.shot img {
    position: absolute;
    inset: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    object-position: center;
    background: #0A0F2C;
    pointer-events: none;
}
.shot__notch { display: none; }

/* ---------- 9. 团队 ---------- */
.team { padding: 80px var(--pad-x); }
.team__grid {
    max-width: 920px;
    margin: 0 auto;
    padding-top: 60px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
}
.member {
    position: relative;
    padding: 70px 32px 36px;
    background: var(--bg-glass);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    text-align: center;
    overflow: visible;
    transform: translateZ(0);
    isolation: isolate;
    transition: transform .4s var(--easing), border-color .4s ease;
}
.member::after {
    content: "";
    position: absolute;
    top: -1px; left: 24px; right: 24px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-primary-light), transparent);
    opacity: .6;
    pointer-events: none;
}
.member::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow: 0 6px 18px rgba(7, 18, 50, 0.12);
    z-index: -1;
    pointer-events: none;
    transition: box-shadow .4s ease;
}
.member:hover { transform: translateY(-6px) translateZ(0); border-color: rgba(91, 156, 255, 0.4); }
.member:hover::before { box-shadow: var(--shadow-glow); }

.member__avatar {
    width: 100px; height: 100px;
    margin: -110px auto 18px;
    padding: 3px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-primary-light), var(--c-primary), var(--c-accent));
    position: relative;
    z-index: 2;
    box-shadow: 0 12px 28px rgba(7, 18, 50, 0.5);
}
.member__avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; background: var(--bg); }
.member__role { font-size: 12.5px; letter-spacing: .5px; color: var(--c-primary-light); margin-bottom: 6px; font-weight: 500; }
.member__name { font-size: 22px; margin-bottom: 10px; letter-spacing: .3px; }
.member__bio { font-size: 13.5px; color: var(--ink-2); line-height: 1.65; }

/* ---------- 10. 下载 CTA ---------- */
.cta { padding: 60px var(--pad-x) 100px; }
.cta__inner {
    max-width: 980px;
    margin: 0 auto;
    padding: clamp(40px, 5.5vw, 68px) clamp(28px, 5vw, 64px);
    background:
        radial-gradient(140% 140% at 0% 0%,   rgba(47, 124, 246, 0.32), transparent 55%),
        radial-gradient(140% 140% at 100% 100%, rgba(255, 159, 46, 0.22), transparent 55%),
        linear-gradient(180deg, #0F1A45 0%, #0A1232 100%);
    border: 1px solid var(--line);
    border-radius: var(--r-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta__inner::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(120, 160, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(120, 160, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    -webkit-mask-image: radial-gradient(ellipse at 50% 50%, #000, transparent 75%);
            mask-image: radial-gradient(ellipse at 50% 50%, #000, transparent 75%);
    pointer-events: none;
}
.cta__inner::after {
    content: "";
    position: absolute;
    top: -1px; left: 22%; right: 22%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-primary-light), transparent);
    opacity: .7;
}
.cta h2 { font-size: clamp(26px, 3.4vw, 40px); line-height: 1.3; margin-bottom: 12px; position: relative; }
.cta h2 em {
    font-style: normal;
    background: linear-gradient(135deg, var(--c-primary-light), var(--c-accent));
    -webkit-background-clip: text;
            background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.cta__sub { font-size: 14.5px; color: var(--ink-2); margin-bottom: 34px; letter-spacing: .5px; position: relative; }
.cta__actions { display: flex; justify-content: center; margin-bottom: 34px; position: relative; }

.cta__trust { display: flex; flex-wrap: wrap; justify-content: center; gap: 28px; position: relative; }
.cta__trust li { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--ink-3); transition: color .3s ease; }
.cta__trust li:hover { color: var(--ink); }
.cta__trust svg { width: 17px; height: 17px; }

/* ---------- 11. 页脚 ---------- */
.foot { padding: 60px var(--pad-x) 34px; border-top: 1px solid var(--line); }
.foot__inner {
    max-width: 1240px;
    margin: 0 auto 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    flex-wrap: wrap;
}
.foot__brand { display: flex; align-items: center; gap: 12px; }
.foot__brand .nav__brand-mark { width: 32px; height: 32px; }
.foot__brand-text { font-size: 17px; font-weight: 700; letter-spacing: 1px; }
.foot__slogan { font-size: 13px; color: var(--ink-3); margin-top: 8px; letter-spacing: .5px; }

.foot__social { display: flex; gap: 12px; flex-wrap: wrap; }
.foot__social a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 18px;
    border-radius: 99px;
    font-size: 13.5px;
    color: var(--ink-2);
    background: rgba(120, 160, 255, 0.06);
    border: 1px solid var(--line);
    transition: color .3s ease, border-color .3s ease, transform .3s var(--easing), background .3s ease;
}
.foot__social a:hover { color: #fff; transform: translateY(-2px); border-color: rgba(91, 156, 255, 0.45); background: rgba(91, 156, 255, 0.14); }
.foot__social svg { width: 16px; height: 16px; flex-shrink: 0; }

.foot__bottom {
    max-width: 1240px;
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid var(--line-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    font-size: 12.5px;
    color: var(--ink-3);
}
.foot__bottom-left { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.foot__divider { opacity: .5; }
.foot__bottom a { color: var(--ink-3); transition: color .3s ease; }
.foot__bottom a:hover { color: var(--c-primary-light); }

.foot__runtime { display: inline-flex; align-items: center; gap: 10px; font-variant-numeric: tabular-nums; }
.foot__runtime-label { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-2); }
.foot__runtime-label::before {
    content: "";
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--c-success);
    box-shadow: 0 0 0 4px rgba(39, 196, 107, 0.18);
    animation: pulse-green 1.6s ease-in-out infinite;
}
@keyframes pulse-green {
    0%, 100% { box-shadow: 0 0 0 4px rgba(39, 196, 107, 0.18); }
    50%      { box-shadow: 0 0 0 8px rgba(39, 196, 107, 0.05); }
}

/* ---------- 12. 响应式 ---------- */
@media (max-width: 1024px) {
    .hero__inner { grid-template-columns: 1fr; gap: 48px; text-align: center; }
    .hero__lede { margin-left: auto; margin-right: auto; }
    .hero__actions { justify-content: center; }
    .hero__stats { margin: 0 auto; justify-content: center; }
    .hero__visual { max-width: 340px; }
    .f-card--lg, .f-card--feat { grid-column: span 6; }
    .f-card--lg { grid-row: auto; }
    .f-card--wide { flex-direction: column; align-items: flex-start; }
    .f-card__metrics { padding-left: 0; border-left: 0; padding-top: 24px; border-top: 1px solid var(--line-soft); width: 100%; }
}

@media (max-width: 768px) {
    .nav__toggle { display: block; }
    .nav__menu {
        position: fixed;
        top: 0; right: 0; bottom: 0;
        width: min(78vw, 320px);
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        gap: 28px;
        padding: 0 32px;
        background: rgba(9, 14, 40, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-left: 1px solid var(--line);
        transform: translateX(100%);
        transition: transform .4s var(--easing);
        z-index: 99;
    }
    .nav__menu.is-open { transform: translateX(0); }
    .nav__menu a { font-size: 17px; }
    .nav__menu a.active::after { left: 0; transform: none; }

    .hero { padding: 130px var(--pad-x) 40px; }
    .hero__stats { gap: 26px; }
    .hero__stats strong { font-size: 24px; }

    .feature, .team { padding: 60px var(--pad-x); }
    .section-head { margin-bottom: 40px; }
    .feature__grid { grid-template-columns: 1fr; gap: 16px; }
    .f-card, .f-card--lg, .f-card--feat, .f-card--wide { grid-column: span 1; }
    .f-card__metrics { grid-template-columns: repeat(2, 1fr); }
    .showcase { padding: 60px 0 70px; }

    .team__grid { padding-top: 70px; grid-template-columns: 1fr; gap: 70px; }
    .foot__inner { flex-direction: column; align-items: flex-start; }
    .foot__bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .btn { padding: 14px 22px; font-size: 14.5px; }
    .hero__actions { flex-direction: column; align-items: stretch; }
    .hero__stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .cta__trust { gap: 14px 20px; }
    .foot__social a span { display: none; }
    .foot__social a { padding: 10px; }
}

/* ---------- 13. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
    .reveal { opacity: 1; transform: none; }
}