/* =====================================================================
   方方软件 · 站点样式（毛玻璃版）
   iOS 风：全局柔光底 + 半透明面板 + 高光描边
   支持：明亮 / 暗黑（html[data-theme]）、标准 / 超大字号（html[data-font]）
   ===================================================================== */

:root {
    --ink: #0b1a2f;
    --ink-2: #22364f;
    --mut: #5c7593;
    --mut-2: #8aa0b8;
    --line: #e2ebf7;
    --line-2: #eef4fb;
    --bg: #f6f9fd;
    --card: #ffffff;
    --blue: #1f5eff;
    --blue-d: #1447cc;
    --cyan: #06b6d4;
    --grad: linear-gradient(135deg, #1f5eff 0%, #3b82f6 45%, #06b6d4 100%);
    --r: 16px;
    --shadow-s: 0 1px 2px rgba(11, 26, 47, .05), 0 8px 20px -14px rgba(11, 26, 47, .18);
    --shadow-m: 0 2px 6px rgba(11, 26, 47, .05), 0 26px 48px -30px rgba(11, 26, 47, .32);

    --glass: rgba(255, 255, 255, .46);
    --glass-2: rgba(255, 255, 255, .28);
    --glass-brd: rgba(255, 255, 255, .75);
    --glass-shadow: 0 20px 46px -26px rgba(11, 26, 47, .38), 0 2px 8px -4px rgba(11, 26, 47, .10);
    --glass-inner: inset 0 1px 0 rgba(255, 255, 255, .9);
    --blur: saturate(190%) blur(34px);

    --ease: cubic-bezier(.3, .7, .1, 1);
    color-scheme: light;
}

html[data-theme="dark"] {
    --ink: #eaf2fb;
    --ink-2: #cfdced;
    --mut: #93a9c4;
    --mut-2: #6d86a3;
    --line: rgba(255, 255, 255, .10);
    --line-2: rgba(255, 255, 255, .06);
    --bg: #070d18;
    --card: #101a2b;
    --blue: #5b8bff;
    --blue-d: #8fb0ff;
    --cyan: #35d0e8;
    --grad: linear-gradient(135deg, #2f6bff 0%, #5b8bff 45%, #22c8e0 100%);
    --shadow-s: 0 1px 2px rgba(0, 0, 0, .5), 0 10px 24px -16px rgba(0, 0, 0, .8);
    --shadow-m: 0 2px 8px rgba(0, 0, 0, .5), 0 30px 60px -34px #000;

    --glass: rgba(28, 40, 62, .46);
    --glass-2: rgba(18, 27, 43, .34);
    --glass-brd: rgba(255, 255, 255, .10);
    --glass-shadow: 0 24px 52px -28px #000, 0 2px 10px -6px rgba(0, 0, 0, .65);
    --glass-inner: inset 0 1px 0 rgba(255, 255, 255, .07);
    color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body { margin: 0; background: transparent; color: var(--ink-2); }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.68;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* ---------- 全局柔光底 ---------- */
body::before {
    content: "";
    position: fixed;
    inset: -14% -14% -14% -14%;
    z-index: -2;
    pointer-events: none;
    background:
        radial-gradient(560px 470px at 4% 0%, rgba(37, 99, 235, .72), transparent 58%),
        radial-gradient(520px 440px at 96% 4%, rgba(6, 182, 212, .55), transparent 58%),
        radial-gradient(600px 480px at 86% 42%, rgba(79, 70, 229, .38), transparent 60%),
        radial-gradient(680px 520px at 62% 100%, rgba(124, 58, 237, .46), transparent 60%),
        radial-gradient(480px 420px at 10% 82%, rgba(16, 185, 129, .34), transparent 60%),
        radial-gradient(420px 360px at 40% 46%, rgba(255, 255, 255, .30), transparent 62%),
        linear-gradient(180deg, #e9f1fc 0%, #f5f9ff 46%, #eaf2fc 100%);
    filter: blur(4px) saturate(130%);
    animation: meshDrift 26s ease-in-out infinite alternate;
}
html[data-theme="dark"] body::before {
    background:
        radial-gradient(560px 470px at 4% 0%, rgba(47, 107, 255, .40), transparent 58%),
        radial-gradient(520px 440px at 96% 4%, rgba(6, 182, 212, .26), transparent 58%),
        radial-gradient(600px 480px at 86% 42%, rgba(79, 70, 229, .30), transparent 60%),
        radial-gradient(680px 520px at 62% 100%, rgba(124, 58, 237, .34), transparent 60%),
        radial-gradient(480px 420px at 10% 82%, rgba(16, 185, 129, .16), transparent 60%),
        linear-gradient(180deg, #070d18 0%, #0a1220 45%, #070d18 100%);
}
@keyframes meshDrift {
    0% { transform: translate3d(0, 0, 0) scale(1); }
    100% { transform: translate3d(-1.6%, 1.4%, 0) scale(1.04); }
}

h1, h2, h3, h4 { margin: 0; color: var(--ink); font-weight: 700; letter-spacing: -.02em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
em { font-style: normal; }
[hidden] { display: none !important; }

.wrap { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

/* ============================ 顶栏 ============================ */
.nav {
    position: fixed; inset: 0 0 auto 0; z-index: 100;
    height: 64px;
    background: var(--glass-2);
    -webkit-backdrop-filter: var(--blur);
    backdrop-filter: var(--blur);
    border-bottom: 1px solid transparent;
    transition: background .25s, border-color .25s, box-shadow .25s;
}
.nav.scrolled {
    background: var(--glass);
    border-bottom-color: var(--glass-brd);
    box-shadow: 0 12px 30px -26px rgba(11, 26, 47, .8), var(--glass-inner);
}
.nav-in {
    max-width: 1210px; margin: 0 auto; height: 100%;
    padding: 0 22px; display: flex; align-items: center; gap: 20px;
}

.brand { display: flex; align-items: center; gap: 9px; flex: none; }
.brand .mark { width: 28px; height: 28px; color: var(--blue); display: block; flex: none; }
.brand .mark svg { width: 100%; height: 100%; display: block; }
.brand-txt { display: flex; flex-direction: column; line-height: 1.05; }
.brand-txt b { font-size: 15.5px; color: var(--ink); letter-spacing: .01em; }
.brand-txt i { font-style: normal; font-size: 8.5px; color: var(--mut-2); letter-spacing: 1.5px; margin-top: 3px; }

.menu { display: flex; align-items: center; gap: 2px; margin-left: 4px; }
.menu a {
    padding: 8px 13px; border-radius: 9px;
    font-size: 13.8px; font-weight: 500; color: var(--mut);
    transition: color .18s, background .18s;
    white-space: nowrap;
}
.menu a:hover { color: var(--ink); background: rgba(31, 94, 255, .07); }
.menu a.on { color: var(--blue-d); background: rgba(31, 94, 255, .1); font-weight: 650; }

.nav-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.sw {
    display: flex; gap: 3px; padding: 3px; border-radius: 10px;
    background: var(--glass-2); border: 1px solid var(--glass-brd);
    -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
.sw button {
    display: inline-flex; align-items: center; justify-content: center; gap: 4px;
    height: 26px; min-width: 30px; padding: 0 8px;
    border: 0; border-radius: 7px; background: transparent;
    color: var(--mut); font-family: inherit; font-size: 11.5px; font-weight: 600;
    cursor: pointer; transition: background .16s, color .16s;
}
.sw button:hover { color: var(--ink); background: rgba(31, 94, 255, .08); }
.sw button.on { background: rgba(255, 255, 255, .92); color: var(--blue-d); box-shadow: 0 1px 3px rgba(11, 26, 47, .12); }
html[data-theme="dark"] .sw button.on { background: rgba(120, 160, 255, .26); color: #cfe0ff; }
.sw button svg { width: 13px; height: 13px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.sw .fa { font-style: normal; font-weight: 800; line-height: 1; font-size: 11.5px; }
.sw button[data-font="large"] .fa { font-size: 15px; }

.nav-cta {
    display: inline-flex; align-items: center; height: 36px; padding: 0 16px;
    border-radius: 10px; background: var(--grad); color: #fff;
    font-size: 13.5px; font-weight: 600;
    box-shadow: 0 8px 18px -10px rgba(31, 94, 255, .85);
    transition: transform .18s var(--ease), box-shadow .18s;
    white-space: nowrap;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 12px 22px -10px rgba(31, 94, 255, .9); }

.burger { display: none; width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 9px; background: var(--glass); padding: 9px 8px; cursor: pointer; }
.burger span { display: block; height: 2px; border-radius: 2px; background: var(--ink-2); margin: 4px 0; }

/* ============================ 按钮 ============================ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    height: 44px; padding: 0 22px;
    border-radius: 12px; border: 1px solid transparent;
    font-family: inherit; font-size: 14.5px; font-weight: 600;
    cursor: pointer; white-space: nowrap;
    transition: transform .18s var(--ease), box-shadow .2s, background .2s, border-color .2s, color .2s;
}
.btn.lg { height: 50px; padding: 0 26px; font-size: 15.5px; border-radius: 13px; }
.btn.full { width: 100%; }
.btn.primary {
    background: var(--grad); color: #fff;
    box-shadow: 0 14px 30px -16px rgba(31, 94, 255, .85), inset 0 1px 0 rgba(255, 255, 255, .45);
}
.btn.primary:hover { transform: translateY(-1px); box-shadow: 0 20px 38px -16px rgba(31, 94, 255, .9), inset 0 1px 0 rgba(255, 255, 255, .5); }
.btn.ghost {
    background: var(--glass); border-color: var(--glass-brd); color: var(--ink-2);
    -webkit-backdrop-filter: blur(14px) saturate(160%); backdrop-filter: blur(14px) saturate(160%);
    box-shadow: var(--shadow-s);
}
.btn.ghost:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-1px); }

/* ============================ 页头 ============================ */
.phead {
    position: relative;
    padding: 130px 0 50px;
    border-bottom: 1px solid var(--line-2);
    overflow: hidden;
}
.phead::after {
    content: "";
    position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(31, 94, 255, .045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(31, 94, 255, .045) 1px, transparent 1px);
    background-size: 56px 56px;
    -webkit-mask-image: radial-gradient(760px 420px at 50% 0%, #000, transparent 78%);
    mask-image: radial-gradient(760px 420px at 50% 0%, #000, transparent 78%);
    opacity: .55;
}
.phead-in { position: relative; z-index: 1; text-align: center; }

.tagline {
    display: inline-flex; align-items: center; gap: 8px;
    height: 32px; padding: 0 15px 0 12px;
    border-radius: 999px;
    background: var(--glass); border: 1px solid var(--glass-brd);
    -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur);
    box-shadow: var(--shadow-s), var(--glass-inner);
    font-size: 12.5px; font-weight: 600; color: var(--mut);
}
.tagline .dot { width: 6px; height: 6px; border-radius: 50%; background: #10b981; box-shadow: 0 0 0 3px rgba(16, 185, 129, .16); }

.phead h1 {
    margin: 22px auto 0;
    font-size: clamp(32px, 4.2vw, 48px);
    line-height: 1.2;
    letter-spacing: -.028em;
    max-width: 17em;
}
.phead h1 em { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; padding: 0 2px; }

.claim {
    margin: 14px auto 0; display: inline-flex; align-items: center; gap: 8px;
    font-size: 16px; font-weight: 700; color: var(--blue-d);
}
.claim svg { width: 17px; height: 17px; color: #f59e0b; }
.claim span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

.phead .sub {
    margin: 18px auto 0; max-width: 660px;
    font-size: 15.5px; color: var(--mut); line-height: 1.85;
}
.phead .sub b { color: var(--ink-2); font-weight: 600; }

.phead-cta { margin-top: 28px; display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* 指标条 */
.keys {
    margin: 42px auto 0;
    display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
    max-width: 880px;
    border-radius: 20px;
    background: var(--glass); border: 1px solid var(--glass-brd);
    -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur);
    box-shadow: var(--glass-shadow), var(--glass-inner);
    overflow: hidden;
}
.keys li { padding: 18px 12px; text-align: center; border-right: 1px solid rgba(255, 255, 255, .5); }
html[data-theme="dark"] .keys li { border-right-color: rgba(255, 255, 255, .07); }
.keys li:last-child { border-right: 0; }
.keys b { display: block; font-size: 22px; font-weight: 700; color: var(--ink); letter-spacing: -.02em; line-height: 1.3; }
.keys span { display: block; margin-top: 3px; font-size: 12.5px; color: var(--mut-2); }

.proof {
    margin: 22px auto 0;
    display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: center;
    padding: 8px 16px; border-radius: 999px;
    background: var(--glass-2); border: 1px solid var(--glass-brd);
    -webkit-backdrop-filter: blur(16px) saturate(160%); backdrop-filter: blur(16px) saturate(160%);
    font-size: 12.8px; color: var(--mut);
}
.proof b { color: var(--ink-2); font-weight: 650; }
.proof .sep { width: 1px; height: 11px; background: var(--line); }
.proof .live { display: inline-flex; align-items: center; gap: 6px; color: #0f9d68; font-weight: 650; }
.proof .live i { width: 6px; height: 6px; border-radius: 50%; background: #10b981; box-shadow: 0 0 0 3px rgba(16, 185, 129, .18); animation: pulse 1.8s infinite; }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, .45); } 50% { box-shadow: 0 0 0 4px rgba(16, 185, 129, 0); } }

/* ============================ 区块 ============================ */
.sect { padding: 78px 0; border-top: 1px solid var(--line-2); }
.sect.alt { background: rgba(255, 255, 255, .22); border-top-color: var(--line); border-bottom: 1px solid var(--line); }
html[data-theme="dark"] .sect.alt { background: rgba(255, 255, 255, .03); }
.sect:first-of-type { border-top: 0; }

.sec-head { max-width: 660px; }
.sec-head.center { margin: 0 auto; text-align: center; }

.kicker { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .14em; color: var(--blue); }
.sect h2 { margin-top: 10px; font-size: clamp(24px, 2.6vw, 33px); line-height: 1.3; letter-spacing: -.022em; }
.sect .sp { margin-top: 14px; color: var(--mut); font-size: 15px; line-height: 1.85; }

.grid-2 {
    display: grid;
    grid-template-columns: minmax(0, 1.32fr) minmax(0, .78fr);
    gap: 56px; align-items: start;
}

.feat { margin-top: 28px; }
.feat li { display: flex; gap: 14px; padding: 15px 0; border-top: 1px solid var(--line-2); }
.feat li:first-child { border-top: 0; padding-top: 4px; }
.feat .fi {
    flex: none; width: 26px; height: 26px; border-radius: 8px;
    background: rgba(31, 94, 255, .08); color: var(--blue);
    font-size: 11px; font-weight: 700; display: grid; place-items: center; margin-top: 2px;
}
.feat b { display: block; font-size: 15.5px; color: var(--ink); font-weight: 650; }
.feat span { display: block; margin-top: 3px; font-size: 13.5px; color: var(--mut); line-height: 1.72; }

.feat.feat2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 36px; }
.feat.feat2 li:nth-last-child(2), .feat.feat2 li:last-child { border-bottom: 0; }

.scenes { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.scenes span {
    height: 30px; padding: 0 13px; display: inline-flex; align-items: center;
    border-radius: 9px;
    background: var(--glass); border: 1px solid var(--glass-brd);
    -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur);
    box-shadow: var(--glass-shadow), var(--glass-inner);
    font-size: 13px; font-weight: 550; color: var(--ink-2);
}

.sect-cta { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }

/* ============================ 卡片 ============================ */
.side, .plan, .c3 {
    background: var(--glass);
    -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur);
    border: 1px solid var(--glass-brd);
    box-shadow: var(--glass-shadow), var(--glass-inner);
    border-radius: 24px;
}

.side { padding: 24px 22px 20px; position: sticky; top: 88px; }
.s-head { display: flex; align-items: center; gap: 9px; }
.s-tag {
    height: 23px; padding: 0 9px; display: inline-flex; align-items: center;
    border-radius: 6px; background: rgba(31, 94, 255, .1); color: var(--blue-d);
    font-size: 11.5px; font-weight: 700;
}
.s-name { font-size: 13.5px; font-weight: 600; color: var(--ink-2); }
.s-num {
    margin-top: 15px; display: flex; align-items: baseline;
    color: var(--ink); font-size: 42px; font-weight: 750; letter-spacing: -.035em; line-height: 1;
}
.s-num i { font-style: normal; font-size: 21px; font-weight: 700; margin-right: 3px; color: var(--ink-2); }
.s-unit { font-size: 13.5px; font-weight: 600; color: var(--mut); margin-left: 7px; letter-spacing: 0; }
.s-note {
    margin-top: 11px; display: inline-block;
    padding: 7px 11px; border-radius: 8px;
    background: rgba(31, 94, 255, .10); color: var(--blue-d);
    font-size: 13.5px; font-weight: 650;
}
.s-list { margin: 17px 0 20px; display: flex; flex-direction: column; gap: 9px; }
.s-list li { position: relative; padding-left: 23px; font-size: 13.5px; color: var(--ink-2); }
.s-list li::before { content: ""; position: absolute; left: 1px; top: 5px; width: 14px; height: 14px; border-radius: 50%; background: rgba(16, 185, 129, .18); }
.s-list li::after {
    content: ""; position: absolute; left: 5px; top: 9px; width: 6px; height: 3px;
    border-left: 1.8px solid #10b981; border-bottom: 1.8px solid #10b981; transform: rotate(-45deg);
}
.s-fine { margin-top: 13px; font-size: 12px; color: var(--mut-2); line-height: 1.7; }

.cards3 { margin-top: 32px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.c3 { padding: 24px 22px; border-radius: 20px; transition: transform .22s var(--ease), box-shadow .22s; }
.c3:hover { transform: translateY(-3px); box-shadow: 0 28px 54px -30px rgba(11, 26, 47, .45), var(--glass-inner); }
.c3 .ico {
    width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center;
    background: rgba(31, 94, 255, .10); color: var(--blue); margin-bottom: 14px;
}
.c3 .ico svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.c3 b { display: block; font-size: 15.5px; color: var(--ink); }
.c3 p { margin-top: 7px; font-size: 13.5px; color: var(--mut); line-height: 1.72; }

/* 两套方案 */
.plans { margin-top: 34px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: stretch; }
.plan { position: relative; display: flex; flex-direction: column; padding: 28px 26px 24px; border-radius: 24px; }
.plan.hot { border-color: rgba(31, 94, 255, .45); box-shadow: 0 26px 60px -34px rgba(31, 94, 255, .75), var(--glass-inner); }
.plan.hot::before {
    content: ""; position: absolute; inset: -1px -1px auto -1px; height: 3px;
    border-radius: 24px 24px 0 0; background: var(--grad);
}
.plan-badge {
    position: absolute; top: 20px; right: 20px;
    height: 24px; padding: 0 11px; display: inline-flex; align-items: center;
    border-radius: 999px; background: var(--grad); color: #fff;
    font-size: 11.5px; font-weight: 700;
    box-shadow: 0 8px 16px -10px rgba(31, 94, 255, .9);
}
.plan-badge.plain { background: rgba(31, 94, 255, .10); color: var(--blue-d); box-shadow: none; }
.plan h3 { font-size: 19px; letter-spacing: -.015em; }
.plan .p-sub { margin-top: 6px; font-size: 13px; color: var(--mut); }
.plan .p-price {
    margin-top: 18px; display: flex; align-items: baseline;
    font-size: 44px; font-weight: 750; letter-spacing: -.035em; line-height: 1; color: var(--ink);
}
.plan .p-price i { font-style: normal; font-size: 21px; font-weight: 700; margin-right: 3px; color: var(--ink-2); }
.plan .p-price span { font-size: 13.5px; font-weight: 600; color: var(--mut); margin-left: 8px; letter-spacing: 0; }
.plan .spec { margin-top: 15px; display: flex; gap: 7px; flex-wrap: wrap; }
.plan .spec span {
    height: 26px; display: inline-flex; align-items: center; padding: 0 10px;
    border-radius: 8px; background: rgba(31, 94, 255, .09); color: var(--blue-d);
    font-size: 12px; font-weight: 650;
}
.plan ul { margin: 17px 0 22px; display: flex; flex-direction: column; gap: 10px; }
.plan li { position: relative; padding-left: 23px; font-size: 13.5px; color: var(--ink-2); line-height: 1.65; }
.plan li::before { content: ""; position: absolute; left: 2px; top: 6px; width: 6px; height: 6px; border-radius: 50%; background: rgba(31, 94, 255, .55); box-shadow: 0 0 0 3px rgba(31, 94, 255, .10); }
.plan li b { color: var(--ink); font-weight: 700; }
.plan .btn { margin-top: auto; }

.plan-fine { margin-top: 18px; font-size: 12px; color: var(--mut-2); line-height: 1.75; text-align: center; }
.plan-fine b { color: var(--ink-2); font-weight: 650; }

/* ============================ 演示卡 / 弹窗 ============================ */
.demo-card {
    position: relative; display: block; width: 100%; margin-top: 26px;
    min-height: 300px; padding: 0; text-align: left; cursor: pointer;
    border: 1px solid var(--glass-brd); border-radius: 22px;
    overflow: hidden;
    background:
        radial-gradient(620px 320px at 16% 6%, rgba(31, 94, 255, .55), transparent 62%),
        radial-gradient(520px 300px at 88% 94%, rgba(6, 182, 212, .42), transparent 62%),
        linear-gradient(150deg, #0f1f3a, #0a1526 58%, #122544);
    box-shadow: var(--glass-shadow), var(--glass-inner);
    transition: transform .26s var(--ease), box-shadow .26s;
}
.demo-card:hover { transform: translateY(-3px); box-shadow: 0 34px 60px -30px rgba(11, 26, 47, .55); }
.demo-card .dc-halo {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .055) 1px, transparent 1px);
    background-size: 46px 46px;
    -webkit-mask-image: radial-gradient(700px 380px at 50% 40%, #000, transparent 78%);
    mask-image: radial-gradient(700px 380px at 50% 40%, #000, transparent 78%);
}
.demo-card .dc-play {
    position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
    width: 72px; height: 72px; border-radius: 50%;
    display: grid; place-items: center;
    background: rgba(255, 255, 255, .94); color: #1f5eff;
    box-shadow: 0 18px 40px -18px rgba(0, 0, 0, .85);
    transition: transform .26s var(--ease), background .2s;
}
.demo-card:hover .dc-play { transform: translate(-50%, -50%) scale(1.08); background: #fff; }
.demo-card .dc-play svg { width: 26px; height: 26px; margin-left: 3px; }
.demo-card .dc-txt { position: absolute; left: 26px; bottom: 22px; display: flex; flex-direction: column; gap: 4px; }
.demo-card .dc-txt b { color: #fff; font-size: 19px; font-weight: 750; letter-spacing: -.01em; }
.demo-card .dc-txt i { font-style: normal; font-size: 13px; color: rgba(255, 255, 255, .72); }
.demo-card .dc-tag {
    position: absolute; right: 20px; bottom: 22px;
    font-size: 11.5px; color: rgba(255, 255, 255, .62);
    border: 1px solid rgba(255, 255, 255, .22); padding: 4px 10px; border-radius: 999px;
}
.rd-hint { font-size: 12px; color: var(--mut-2); line-height: 1.7; }

.amodal { position: fixed; inset: 0; z-index: 900; display: flex; align-items: center; justify-content: center; padding: 24px; }
.amodal-mask {
    position: absolute; inset: 0;
    background: rgba(8, 16, 30, .42);
    -webkit-backdrop-filter: blur(10px) saturate(120%); backdrop-filter: blur(10px) saturate(120%);
    opacity: 0; transition: opacity .22s;
}
.amodal.show .amodal-mask { opacity: 1; }
.amodal-box {
    position: relative;
    width: min(1180px, 94vw); height: min(86vh, 900px);
    display: flex; flex-direction: column; overflow: hidden;
    border-radius: 22px;
    background: var(--glass);
    -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur);
    border: 1px solid var(--glass-brd);
    box-shadow: 0 40px 90px -40px rgba(0, 0, 0, .6), var(--glass-inner);
    transform: translateY(14px) scale(.985); opacity: 0;
    transition: transform .26s var(--ease), opacity .26s;
}
.amodal.show .amodal-box { transform: none; opacity: 1; }
.amodal-bar {
    flex: none; height: 46px;
    display: flex; align-items: center; gap: 10px;
    padding: 0 12px 0 14px;
    border-bottom: 1px solid var(--glass-brd);
    background: rgba(255, 255, 255, .35);
    font-size: 13px;
}
html[data-theme="dark"] .amodal-bar { background: rgba(255, 255, 255, .04); }
.amodal-dots { display: flex; gap: 6px; }
.amodal-dots i { width: 10px; height: 10px; border-radius: 50%; background: #ff5f57; }
.amodal-dots i:nth-child(2) { background: #febc2e; }
.amodal-dots i:nth-child(3) { background: #28c840; }
.amodal-bar b { color: var(--ink); font-weight: 650; }
.amodal-hint { font-size: 11.5px; color: var(--mut-2); }
.amodal-open { margin-left: auto; font-size: 12.5px; color: var(--blue); font-weight: 600; }
.amodal-open:hover { text-decoration: underline; }
.amodal-x {
    width: 28px; height: 28px; display: grid; place-items: center;
    border: 0; border-radius: 8px; background: rgba(11, 26, 47, .06);
    color: var(--ink-2); font-size: 13px; cursor: pointer;
}
.amodal-x:hover { background: rgba(239, 68, 68, .14); color: #ef4444; }
.amodal-body { flex: 1; min-height: 0; background: var(--card); }
.amodal-slot { width: 100%; height: 100%; }
.amodal-slot iframe { width: 100%; height: 100%; border: 0; display: block; background: var(--card); }
.amodal-box.is-demo { width: min(1060px, 94vw); height: auto; max-height: 88vh; }
.amodal-box.is-demo .amodal-body { background: transparent; padding: 14px; }
.amodal-box.is-demo .amodal-x { margin-left: auto; }
body.modal-open { overflow: hidden; }

/* ============================ 底部联系 ============================ */
.cta-band { padding: 0 0 72px; }
.cta-card {
    display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    gap: 36px; align-items: center;
    padding: 42px 40px; border-radius: 26px;
    background:
        radial-gradient(560px 240px at 100% 0%, rgba(6, 182, 212, .12), transparent 60%),
        radial-gradient(640px 280px at 0% 100%, rgba(31, 94, 255, .10), transparent 62%),
        var(--glass);
    -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur);
    border: 1px solid var(--glass-brd);
    box-shadow: var(--glass-shadow), var(--glass-inner);
}
.cta-card h2 { font-size: clamp(22px, 2.4vw, 27px); }
.cta-card p { margin-top: 10px; color: var(--mut); font-size: 14px; }
.cta-rows { margin-top: 22px; display: flex; gap: 10px; flex-wrap: wrap; }
.cta-row {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 9px 12px; border-radius: 12px;
    background: var(--glass-2); border: 1px solid var(--glass-brd);
    font-size: 13.5px;
}
.cta-row i { font-style: normal; font-size: 11px; color: var(--mut-2); }
.cta-row b { color: var(--ink); font-weight: 650; }
.copy {
    height: 26px; padding: 0 10px; border-radius: 7px;
    border: 1px solid var(--glass-brd); background: var(--glass);
    color: var(--mut); font-family: inherit; font-size: 11.5px; font-weight: 600;
    cursor: pointer; transition: .18s;
}
.copy:hover { color: var(--blue); border-color: var(--blue); }
.copy.ok { color: #0f9d68; border-color: #b7e8d3; background: #f2fcf8; }
.cta-right { display: flex; flex-direction: column; gap: 10px; }
.cta-tip { font-size: 12px; color: var(--mut-2); line-height: 1.7; }

/* ============================ 页脚 ============================ */
.foot { border-top: 1px solid var(--glass-brd); background: var(--glass-2); padding: 24px 0; -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur); }
.foot-in { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.f-brand { display: flex; align-items: center; gap: 8px; }
.f-brand .mark { width: 20px; height: 20px; color: var(--blue); display: block; }
.f-brand .mark svg { width: 100%; height: 100%; display: block; }
.f-brand b { font-size: 14px; color: var(--ink); }
.f-host { font-size: 12.5px; color: var(--mut-2); padding-left: 8px; border-left: 1px solid var(--line); }
.f-links { display: flex; gap: 16px; margin-left: auto; flex-wrap: wrap; }
.f-links a { font-size: 13px; color: var(--mut); transition: color .18s; }
.f-links a:hover { color: var(--blue); }
.f-meta { width: 100%; font-size: 12px; color: var(--mut-2); padding-top: 12px; border-top: 1px solid var(--line-2); }

/* ============================ 云桌面演示 ============================ */
.rd-window {
    display: flex; flex-direction: column;
    border-radius: 16px; overflow: hidden;
    border: 1px solid rgba(255, 255, 255, .12);
    background: rgba(255, 255, 255, .05);
    box-shadow: 0 24px 50px -30px rgba(0, 0, 0, .7);
}
.rd-bar { height: 38px; display: flex; align-items: center; gap: 10px; padding: 0 12px; background: rgba(255, 255, 255, .06); border-bottom: 1px solid rgba(255, 255, 255, .08); }
.rd-dots { display: flex; gap: 5px; }
.rd-dots i { width: 9px; height: 9px; border-radius: 50%; background: #ff5f57; }
.rd-dots i:nth-child(2) { background: #febc2e; }
.rd-dots i:nth-child(3) { background: #28c840; }
.rd-url {
    flex: 1; height: 24px; display: flex; align-items: center; gap: 8px; padding: 0 10px;
    border-radius: 6px; background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .1);
    font-size: 11.5px; color: #8ea6c0; overflow: hidden; white-space: nowrap;
}
.rd-url em { margin-left: auto; font-style: normal; }
.rd-live { display: inline-flex; align-items: center; gap: 5px; color: #4ade80; font-weight: 600; }
.rd-live i { width: 6px; height: 6px; border-radius: 50%; background: #4ade80; animation: pulse 1.8s infinite; }

.rd-screen {
    position: relative; height: 460px; overflow: hidden; cursor: none;
    background: radial-gradient(600px 300px at 20% 0%, rgba(31, 94, 255, .22), transparent 60%), linear-gradient(150deg, #0e1c33, #0a1526 60%, #122544);
}
html[data-theme="dark"] .rd-screen { background: radial-gradient(600px 300px at 20% 0%, rgba(91, 139, 255, .2), transparent 60%), linear-gradient(150deg, #0a1424, #070f1b 60%, #0d1d33); }
.rd-win {
    position: absolute; left: 44px; right: 44px; top: 26px; bottom: 0;
    display: flex; flex-direction: column; overflow: hidden;
    background: #fff; color: #1e293b; border-radius: 10px 10px 0 0;
    box-shadow: 0 -2px 0 rgba(255, 255, 255, .1), 0 26px 60px -20px rgba(0, 0, 0, .7);
}
.rd-tabs { display: flex; align-items: center; gap: 2px; padding: 7px 8px 0; background: #eef2f8; border-bottom: 1px solid #dde5f0; }
.rd-tab {
    display: inline-flex; align-items: center; gap: 6px;
    height: 26px; padding: 0 12px; border-radius: 7px 7px 0 0;
    font-size: 11.5px; font-weight: 600; color: #64748b;
    transition: background .2s, color .2s;
}
.rd-tab.act { background: #fff; color: #0f172a; box-shadow: 0 -1px 0 #dde5f0, 1px 0 0 #dde5f0, -1px 0 0 #dde5f0; }
.rd-tab .fav { width: 12px; height: 12px; border-radius: 3px; background: #1f5eff; }
.rd-tab:nth-child(2) .fav { background: #ff7a18; }
.rd-omni { display: flex; align-items: center; gap: 8px; padding: 7px 10px; border-bottom: 1px solid #eef2f8; }
.rd-omni .url { flex: 1; height: 24px; display: flex; align-items: center; padding: 0 9px; border-radius: 6px; background: #f4f7fb; font-size: 11px; color: #94a3b8; }
.rd-body { flex: 1; padding: 14px 16px; overflow: hidden; position: relative; }
.rd-h { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 700; color: #0f172a; }
.rd-h .pill { font-size: 10px; font-weight: 700; color: #1f5eff; background: rgba(31, 94, 255, .1); padding: 2px 7px; border-radius: 5px; }
.rd-search { margin-top: 12px; display: flex; gap: 8px; }
.rd-input {
    flex: 1; height: 34px; display: flex; align-items: center; padding: 0 12px;
    border: 1.5px solid #dbe4f0; border-radius: 8px; font-size: 12.5px; color: #0f172a; background: #fff;
    transition: border-color .2s, box-shadow .2s;
}
.rd-input.focus { border-color: #1f5eff; box-shadow: 0 0 0 3px rgba(31, 94, 255, .12); }
.rd-input .ph { color: #b6c6da; }
.rd-input.typing .ph { display: none; }
.rd-input .typed { color: #0f172a; }
.rd-caret { display: inline-block; width: 1.5px; height: 13px; background: #1f5eff; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.rd-go { height: 34px; padding: 0 16px; border-radius: 8px; border: 0; background: linear-gradient(135deg, #1f5eff, #3b82f6); color: #fff; font-size: 12.5px; font-weight: 600; display: inline-flex; align-items: center; box-shadow: 0 6px 14px -8px rgba(31, 94, 255, .9); }
.rd-go.press { transform: translateY(1px) scale(.98); }
.rd-rows { margin-top: 14px; display: flex; flex-direction: column; gap: 7px; }
.rd-row {
    display: flex; align-items: center; gap: 10px; padding: 9px 11px;
    border: 1px solid #eef2f8; border-radius: 9px; background: #fff;
    opacity: 0; transform: translateY(6px);
    transition: opacity .35s, transform .35s, border-color .2s, background .2s;
}
.rd-row.show { opacity: 1; transform: none; }
.rd-row.hot { border-color: rgba(31, 94, 255, .5); background: #f7faff; }
.rd-row .lg { width: 26px; height: 26px; border-radius: 7px; background: #eef4ff; color: #1f5eff; display: grid; place-items: center; font-size: 11px; font-weight: 800; flex: none; }
.rd-row .nm { flex: 1; min-width: 0; }
.rd-row .nm b { display: block; font-size: 12.2px; color: #0f172a; font-weight: 650; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rd-row .nm span { display: block; font-size: 10.8px; color: #8aa0b8; margin-top: 1px; }
.rd-row .risk { font-size: 10.5px; font-weight: 700; padding: 2px 7px; border-radius: 5px; background: #fff4e6; color: #d97706; flex: none; }
.rd-row .risk.ok { background: #eafaf1; color: #0f9d68; }
.rd-detail {
    position: absolute; right: 16px; bottom: 16px; width: 250px; padding: 13px 14px;
    border-radius: 10px; background: #0f172a; color: #dbe6f5;
    box-shadow: 0 20px 40px -20px rgba(0, 0, 0, .8);
    opacity: 0; transform: translateY(10px) scale(.98); transition: opacity .3s, transform .3s;
    pointer-events: none;
}
.rd-detail.show { opacity: 1; transform: none; }
.rd-detail b { display: block; font-size: 12.5px; color: #fff; }
.rd-detail .kv { margin-top: 8px; display: flex; flex-direction: column; gap: 5px; font-size: 11px; }
.rd-detail .kv div { display: flex; justify-content: space-between; gap: 10px; }
.rd-detail .kv i { font-style: normal; color: #8ea6c0; }
.rd-detail .kv em { color: #cfe0f5; font-weight: 600; }
.rd-cursor {
    position: absolute; left: 0; top: 0; width: 18px; height: 24px; pointer-events: none; z-index: 9;
    transition: transform .72s cubic-bezier(.34, .62, .28, 1);
    filter: drop-shadow(0 3px 5px rgba(0, 0, 0, .45));
}
.rd-cursor svg { width: 18px; height: 24px; display: block; }
.rd-cursor::after {
    content: ""; position: absolute; left: -9px; top: -9px; width: 36px; height: 36px;
    border-radius: 50%; border: 1.5px solid rgba(31, 94, 255, .65); opacity: 0;
}
.rd-cursor.click::after { animation: clickRing .5s ease-out; }
@keyframes clickRing { 0% { opacity: .9; transform: scale(.3); } 100% { opacity: 0; transform: scale(1); } }

/* ============================ 采集演示 ============================ */
.cw-wrap { background: #0b1424; border-radius: 16px; overflow: hidden; border: 1px solid rgba(255, 255, 255, .1); color: #cfe0f5; box-shadow: 0 24px 50px -30px rgba(0, 0, 0, .7); }
.cw-head { display: flex; align-items: center; gap: 10px; height: 46px; padding: 0 14px; background: rgba(255, 255, 255, .04); border-bottom: 1px solid rgba(255, 255, 255, .08); }
.cw-live { display: inline-flex; align-items: center; gap: 6px; font-size: 11.5px; color: #4ade80; font-weight: 650; }
.cw-live i { width: 6px; height: 6px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 0 3px rgba(74, 222, 128, .18); animation: pulse 1.6s infinite; }
.cw-head b { color: #eaf2fb; font-size: 13px; font-weight: 650; }
.cw-src { margin-left: auto; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 11px; color: #6d86a3; }
.cw-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-bottom: 1px solid rgba(255, 255, 255, .08); }
.cw-stats > div { padding: 12px 14px; border-right: 1px solid rgba(255, 255, 255, .06); }
.cw-stats > div:last-child { border-right: 0; }
.cw-stats i { display: block; font-style: normal; font-size: 11px; color: #7d94b0; }
.cw-stats b { font-size: 21px; color: #eaf2fb; font-weight: 700; letter-spacing: -.02em; }
.cw-stats span { font-size: 11px; color: #7d94b0; margin-left: 3px; }
.cw-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); min-height: 258px; }
.cw-col { padding: 12px 14px; border-right: 1px solid rgba(255, 255, 255, .06); display: flex; flex-direction: column; min-width: 0; }
.cw-col:last-child { border-right: 0; }
.cw-cap { font-size: 10.5px; color: #6d86a3; letter-spacing: .1em; margin-bottom: 8px; }
.cw-log { flex: 1; overflow: hidden; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 11.2px; line-height: 1.95; color: #9fb6d0; }
.cw-line { display: flex; gap: 8px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; animation: cwIn .3s ease both; }
.cw-line i { font-style: normal; color: #4b6b8f; flex: none; }
@keyframes cwIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.cw-rows { flex: 1; display: flex; flex-direction: column; gap: 6px; overflow: hidden; }
.cw-row {
    display: flex; flex-direction: column; gap: 2px; padding: 7px 9px; border-radius: 8px;
    background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .06);
    opacity: 0; transform: translateY(4px); transition: opacity .3s, transform .3s;
}
.cw-row.show { opacity: 1; transform: none; }
.cw-t { font-size: 11.8px; color: #dbe9fa; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cw-m { display: flex; align-items: center; gap: 6px; font-size: 10.8px; color: #7d94b0; }
.cw-m b { color: #8fb0ff; font-weight: 650; }
.cw-bar { height: 3px; background: rgba(255, 255, 255, .07); }
.cw-bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, #1f5eff, #22c8e0); box-shadow: 0 0 12px rgba(34, 200, 224, .55); transition: width .5s linear; }
.cw-foot { display: flex; justify-content: space-between; gap: 10px; padding: 9px 14px; font-size: 10.8px; color: #6d86a3; border-top: 1px solid rgba(255, 255, 255, .06); }
.cw-note { color: #4b6b8f; flex: none; }

/* ============================ 超大字号 ============================ */
html[data-font="large"] body { font-size: 16.5px; }
html[data-font="large"] .menu a { font-size: 15px; }
html[data-font="large"] .phead h1 { font-size: clamp(34px, 4.6vw, 52px); }
html[data-font="large"] .phead .sub { font-size: 17px; }
html[data-font="large"] .tagline { font-size: 13.8px; }
html[data-font="large"] .keys b { font-size: 24px; }
html[data-font="large"] .keys span { font-size: 13.8px; }
html[data-font="large"] .proof { font-size: 13.5px; }
html[data-font="large"] .sect h2 { font-size: clamp(26px, 2.9vw, 36px); }
html[data-font="large"] .sect .sp { font-size: 16.8px; }
html[data-font="large"] .feat b { font-size: 17.2px; }
html[data-font="large"] .feat span { font-size: 15.2px; }
html[data-font="large"] .s-list li { font-size: 15.2px; }
html[data-font="large"] .s-num { font-size: 46px; }
html[data-font="large"] .s-note { font-size: 15px; }
html[data-font="large"] .s-fine { font-size: 13.5px; }
html[data-font="large"] .c3 b { font-size: 17px; }
html[data-font="large"] .c3 p { font-size: 15.2px; }
html[data-font="large"] .plan h3 { font-size: 21px; }
html[data-font="large"] .plan li { font-size: 15.2px; }
html[data-font="large"] .plan .p-price { font-size: 48px; }
html[data-font="large"] .btn { font-size: 16px; }
html[data-font="large"] .cta-card h2 { font-size: 30px; }
html[data-font="large"] .cta-card p { font-size: 15.5px; }
html[data-font="large"] .cta-row { font-size: 15px; }
html[data-font="large"] .f-links a { font-size: 13.6px; }

/* ============================ 响应式 ============================ */
@media (max-width: 1080px) {
    .menu a { padding: 8px 9px; font-size: 13.2px; }
    .brand-txt i { display: none; }
}

@media (max-width: 960px) {
    .grid-2 { grid-template-columns: minmax(0, 1fr); gap: 34px; }
    .side { position: static; }
    .cards3 { grid-template-columns: minmax(0, 1fr); }
    .cta-card { grid-template-columns: minmax(0, 1fr); padding: 32px 26px; }
    .keys { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .keys li:nth-child(2) { border-right: 0; }
    .keys li:nth-child(1), .keys li:nth-child(2) { border-bottom: 1px solid rgba(255, 255, 255, .5); }
    .feat.feat2 { grid-template-columns: minmax(0, 1fr); }
    .feat.feat2 li:nth-last-child(2) { border-bottom: 1px solid var(--line-2); }
    .plans { grid-template-columns: minmax(0, 1fr); }
    .rd-screen { height: 380px; }
    .rd-win { left: 14px; right: 14px; top: 14px; }
    .cw-body { grid-template-columns: minmax(0, 1fr); }
    .cw-col { border-right: 0; border-bottom: 1px solid rgba(255, 255, 255, .06); }
}

@media (max-width: 860px) {
    .menu {
        position: absolute; top: 64px; left: 0; right: 0;
        flex-direction: column; align-items: stretch; gap: 2px;
        padding: 10px 16px 16px;
        background: var(--glass);
        -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur);
        border-bottom: 1px solid var(--glass-brd);
        box-shadow: 0 20px 30px -26px rgba(11, 26, 47, .6);
        display: none;
    }
    .nav.open .menu { display: flex; }
    .menu a { padding: 12px 14px; font-size: 15px; }
    .burger { display: block; }
    .nav-cta { display: none; }
    .brand-txt { display: none; }
    .sw button span { display: none; }
    .demo-card { min-height: 230px; }
    .amodal { padding: 0; }
    .amodal-box { width: 100%; height: 100%; border-radius: 0; }
    .amodal-hint { display: none; }
}

@media (max-width: 620px) {
    .phead { padding: 108px 0 40px; }
    .phead h1 { font-size: 28px; }
    .phead .sub { font-size: 14.5px; }
    .sect h2 { font-size: 23px; }
    .sect { padding: 54px 0; }
    .s-num { font-size: 36px; }
    .plan .p-price { font-size: 38px; }
    .rd-screen { height: 330px; }
    .rd-win { left: 8px; right: 8px; top: 8px; }
    .f-links { margin-left: 0; }
    .wrap { padding: 0 18px; }
}