/* ============================================================================
   落地页样式（首页专用）—— 独立样式表，不与后台 style.css 互相影响
   设计令牌复用后台同一套主色/圆角/间距/阴影（--color-primary #285ce5 等），
   在此之上补充落地页专用别名（--ink / --muted / --blue / --line / --paper）。
   字体使用系统栈，无 CDN、无外部字体、无外链资源。
   ============================================================================ */

:root {
    /* —— 与后台 style.css 一致的核心令牌（复用，不重定义语义） —— */
    --color-primary: #285ce5;
    --color-primary-hover: #194acf;
    --color-primary-light: #e8efff;
    --color-secondary: #637188;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-danger: #ef4444;
    --color-bg: #f5f7fb;
    --color-surface: #ffffff;
    --color-surface-alt: #f4f7fc;
    --color-border: #dce3ee;
    --color-border-strong: #c9d3e3;
    --color-text-primary: #172338;
    --color-text-secondary: #637188;
    --color-text-tertiary: #8b98ab;
    --color-text-on-primary: #ffffff;
    --text-xs: 12px;
    --text-sm: 14px;
    --text-base: 16px;
    --text-lg: 20px;
    --text-xl: 24px;
    --text-2xl: 32px;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --lh-body: 1.5;
    --lh-heading: 1.25;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-pill: 100px;
    --shadow-1: 0 3px 14px rgba(24, 56, 94, 0.04);
    --shadow-2: 0 12px 32px rgba(36, 53, 80, 0.08);
    --shadow-3: 0 4px 18px rgba(36, 53, 80, 0.055);

    /* —— 落地页专用别名（对应原站 home.min.css 令牌） —— */
    --ink: var(--color-text-primary);
    --muted: var(--color-text-secondary);
    --blue: var(--color-primary);
    --blue-hover: var(--color-primary-hover);
    --line: var(--color-border);
    --paper: var(--color-bg);
    --radius: 28px;

    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background: var(--paper);
    font-synthesis: none;
}

/* ---------------------------------------------------------------- 01 复位 */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 116px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    line-height: 1.7;
    color: var(--ink);
    background: var(--paper);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

button,
input {
    font: inherit;
}

a,
button {
    -webkit-tap-highlight-color: transparent;
}

button {
    cursor: pointer;
    color: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

h1,
h2,
h3,
p,
ol,
ul,
dl,
dd,
dt,
figure {
    margin: 0;
}

ol,
ul {
    padding: 0;
    list-style: none;
}

h1,
h2,
h3 {
    line-height: 1.2;
}

p {
    color: var(--muted);
}

img,
svg {
    display: block;
    max-width: 100%;
}

[hidden] {
    display: none !important;
}

:focus-visible {
    outline: var(--blue) solid 3px;
    outline-offset: 5px;
}

h1 {
    font-size: clamp(46px, 5.4vw, 74px);
    font-weight: 650;
    letter-spacing: -0.055em;
    line-height: 1.15;
}

h1 span {
    display: block;
    margin-top: 9px;
    color: var(--blue);
}

h2 {
    font-size: clamp(32px, 3.8vw, 48px);
    font-weight: 650;
    letter-spacing: -0.04em;
}

.cuican-wrap {
    width: min(1160px, calc(100% - 64px));
    margin-inline: auto;
}

.cuican-eyebrow {
    display: block;
    color: var(--blue);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.18em;
    line-height: 1.5;
}

/* JS 渐进增强：无 JS 时 .cuican-js-only 隐藏，页面仍可完整阅读 */
.cuican-js-only {
    display: none;
}

.cuican-js-ready .cuican-js-only {
    display: flex;
}

.cuican-skip-link {
    position: fixed;
    top: -100px;
    left: 20px;
    padding: 12px 20px;
    background: #fff;
    z-index: 100;
    border-radius: 12px;
    transition: top 0.2s;
}

.cuican-skip-link:focus {
    top: 15px;
}

/* ------------------------------------------------------------ 02 按钮 */
.cuican-button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    min-height: 48px;
    padding: 12px 23px;
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    background: var(--blue);
    color: #fff;
    font-size: var(--text-sm);
    font-weight: var(--fw-semibold);
    transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
}

.cuican-button:hover {
    background: var(--blue-hover);
    box-shadow: 0 8px 24px #285ce529;
    transform: translateY(-2px);
}

.cuican-button.cuican-secondary {
    color: var(--ink);
    background: #ffffffb3;
    border-color: var(--line);
}

.cuican-button.cuican-secondary:hover {
    background: #fff;
}

.cuican-arrow {
    font-size: 19px;
    line-height: 1;
}

/* ------------------------------------------------------------ 03 导航 */
.cuican-nav-shell {
    position: fixed;
    top: 20px;
    left: 0;
    right: 0;
    z-index: 30;
}

.cuican-nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    min-height: 70px;
    padding: 12px 18px 12px 22px;
    background: #ffffffd9;
    border: 1px solid #fff;
    border-radius: 22px;
    box-shadow: 0 8px 36px #2435500b, 0 1px 2px #2039620a;
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
}

.cuican-brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    min-width: 0;
    font-weight: 700;
    font-size: var(--text-base);
    letter-spacing: -0.03em;
}

.cuican-brand-name {
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cuican-brand-mark {
    flex: 0 0 32px;
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, #6486fa, #254dd3);
    box-shadow: inset 0 1px 1px #ffffff80;
    color: #fff;
}

.cuican-brand-mark img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.cuican-nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    margin-left: auto;
}

.cuican-nav-links > a {
    color: #566379;
    font-size: 13px;
    transition: color 0.2s;
}

.cuican-nav-links > a:hover {
    color: var(--blue);
}

.cuican-nav-links > a.cuican-button {
    font-size: var(--text-xs);
    min-height: 40px;
    padding: 8px 17px;
    gap: var(--space-4);
    color: #fff;
}

.cuican-menu-toggle {
    display: none;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    min-height: 42px;
    font-size: 13px;
    color: #566379;
}

/* ------------------------------------------------------------ 04 Hero */
.cuican-hero-zone {
    background:
        radial-gradient(ellipse at 80% 42%, #dce8ff 0, transparent 43%),
        radial-gradient(ellipse at 52% 55%, #eee9ff 0, transparent 40%),
        linear-gradient(#f9fafc, #f2f6fc);
}

.cuican-hero {
    display: grid;
    grid-template-columns: 1.08fr 1fr;
    align-items: center;
    gap: 34px;
    min-height: 820px;
    padding: 155px 0 85px;
}

.cuican-product-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: #4c6486;
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    margin-bottom: 28px;
}

.cuican-product-label::before {
    content: "";
    width: 20px;
    height: 1px;
    background: #7b93b7;
}

.cuican-hero-description {
    font-size: var(--text-base);
    line-height: 1.95;
    max-width: 420px;
    margin-top: 28px;
}

.cuican-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: 34px;
}

.cuican-hero-note {
    font-size: 11px;
    color: #728099;
    margin-top: 21px;
    letter-spacing: 0.035em;
}

.cuican-hero-trust {
    font-size: 11px;
    color: var(--blue);
    margin-top: var(--space-2);
    letter-spacing: 0.035em;
}

.cuican-hero-capabilities {
    display: flex;
    flex-wrap: wrap;
    gap: 21px;
    margin-top: 53px;
    color: #65738a;
    font-size: 11px;
}

.cuican-hero-capabilities span + span {
    padding-left: 21px;
    border-left: 1px solid #ced8e7;
}

.cuican-no-script-note {
    width: min(1160px, calc(100% - 64px));
    margin: 0 auto 32px;
    padding: 14px 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: #ffffffb3;
    font-size: var(--text-xs);
}

/* -------------------------------------------------- 05 演示台 + 手机壳 */
.cuican-device-stage {
    position: relative;
    display: grid;
    justify-items: center;
    padding: 18px 0 32px;
    perspective: 1100px;
}

.cuican-device-stage::before {
    content: "";
    position: absolute;
    top: 90px;
    width: 94%;
    height: 340px;
    border: 1px solid #ffffffc9;
    border-radius: 50%;
    transform: rotate(-30deg);
    box-shadow: 0 0 0 32px #ffffff25, 0 0 0 64px #ffffff15;
    pointer-events: none;
}

.cuican-device-stage::after {
    content: "";
    position: absolute;
    bottom: 6px;
    width: 230px;
    height: 24px;
    border-radius: 50%;
    background: #5b739631;
    filter: blur(17px);
    pointer-events: none;
}

.cuican-device-float {
    animation: demo-float 7s ease-in-out infinite;
}

@keyframes demo-float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-9px);
    }
}

/* 纯 CSS 手机 mockup：圆角矩形 + 刘海 + 屏幕 */
.cuican-phone {
    position: relative;
    width: 294px;
    padding: var(--space-2);
    background: linear-gradient(115deg, #fbfcfe, #9baac2 12%, #f7fbff 30%, #bcc6d7 75%, #eef2f8);
    border: 1px solid #a8b3c6;
    border-radius: 48px;
    box-shadow: 14px 22px 48px #546b8f29, inset 2px 0 2px #fff, 5px 2px 0 #bcc8da;
    transform: rotateY(-9deg) rotateZ(3deg);
    transition: transform 0.35s ease-out;
}

.cuican-phone::before,
.cuican-phone::after {
    content: "";
    position: absolute;
    width: 3px;
    border-radius: 3px;
    background: #a7b5c9;
}

.cuican-phone::before {
    left: -4px;
    top: 118px;
    height: 52px;
}

.cuican-phone::after {
    right: -4px;
    top: 140px;
    height: 74px;
    background: #b2bed0;
}

.cuican-screen {
    position: relative;
    height: 536px;
    min-height: 536px;
    overflow: hidden;
    padding: 15px 19px 17px;
    border: 2px solid #263044;
    border-radius: 39px;
    background:
        radial-gradient(circle at 90% 22%, #dfe8ff, transparent 50%),
        linear-gradient(155deg, #fdfefe, #edf2fc);
}

.cuican-phone-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 23px;
    font-size: 10px;
    font-weight: 700;
    padding: 0 6px;
    color: #33415c;
}

.cuican-island {
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    width: 81px;
    height: 23px;
    border-radius: 20px;
    background: #142033;
    z-index: 2;
}

.cuican-island::after {
    content: "";
    position: absolute;
    right: 9px;
    top: 8px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #334463;
}

.cuican-battery {
    position: relative;
    width: 18px;
    height: 8px;
    border: 1px solid #536077;
    border-radius: 3px;
}

.cuican-battery::after {
    content: "";
    position: absolute;
    left: 2px;
    top: 2px;
    width: 11px;
    height: 4px;
    background: #536077;
}

.cuican-app-preview {
    margin-top: 37px;
    transition: filter 0.25s, opacity 0.25s;
}

.cuican-app-preview small {
    color: #6a7e9d;
    font-size: 9px;
    letter-spacing: 0.15em;
}

.cuican-app-preview h3 {
    margin-top: var(--space-2);
    font-size: 25px;
    letter-spacing: -0.04em;
}

.cuican-app-preview p {
    font-size: 11px;
    line-height: 1.9;
}

.cuican-screen.cuican-has-alert .cuican-app-preview {
    filter: blur(1px);
    opacity: 0.9;
}

.cuican-app-art {
    display: grid;
    place-items: center;
    height: 160px;
    margin: 22px 0 18px;
    border: 1px solid #fff;
    border-radius: 24px;
    background: linear-gradient(145deg, #eef3ff, #dfe8fb);
}

.cuican-app-art span {
    display: grid;
    place-items: center;
    width: 78px;
    height: 78px;
    border-radius: 23px;
    background: #ffffffb8;
    border: 1px solid #fff;
    color: #5073bf;
    font-size: 26px;
    box-shadow: 0 10px 26px #4b6ea81a;
}

.cuican-app-placeholder {
    height: 9px;
    width: 82%;
    border-radius: 9px;
    background: #dce5f3;
    margin-top: var(--space-4);
}

.cuican-app-placeholder + .cuican-app-placeholder {
    width: 55%;
    margin-top: 9px;
}

.cuican-screen-local {
    position: absolute;
    bottom: 35px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 9px;
    color: #596d8b;
    z-index: 2;
    white-space: nowrap;
}

.cuican-home-indicator {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 85px;
    height: 4px;
    background: #26354c;
    border-radius: var(--space-1);
}

/* --------------------------------------------------- 06 iOS 弹窗 + demo */
.cuican-alert-layer {
    position: absolute;
    inset: 0;
    z-index: 3;
    display: grid;
    place-items: center;
    padding: 14px;
    background: #23314b16;
    animation: demo-alert-appear 0.22s ease-out;
}

@keyframes demo-alert-appear {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.cuican-ios-alert {
    position: relative;
    width: 100%;
    max-width: 250px;
    border: 1px solid #ffffffb3;
    border-radius: 30px;
    background: linear-gradient(145deg, #ffffffb8, #f2f6ff70 48%, #ffffff96);
    box-shadow: 0 24px 60px #14203326, 0 4px 14px #1420330d,
        inset 0 1px 1px #fffffff2, inset 0 -1px 1px #ffffff80;
    backdrop-filter: blur(28px) saturate(165%);
    -webkit-backdrop-filter: blur(28px) saturate(165%);
    text-align: center;
    overflow: hidden;
}

.cuican-ios-alert::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, #ffffff6b, transparent 55%);
    pointer-events: none;
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    .cuican-ios-alert {
        background: #eef2faf5;
    }
}

.cuican-alert-content {
    padding: 20px 15px 17px;
}

.cuican-alert-content h3 {
    color: #171719;
    font-size: 17px;
    font-weight: var(--fw-semibold);
}

.cuican-alert-content > p {
    margin-top: var(--space-2);
    color: #333338;
    font-size: var(--text-xs);
    line-height: 1.65;
    white-space: pre-line;
    overflow-wrap: anywhere;
}

.cuican-alert-input-label {
    display: block;
    text-align: left;
    margin: 14px 0 5px;
    font-size: 10px;
    color: #585860;
}

.cuican-alert-input {
    width: 100%;
    min-height: 38px;
    border: 1px solid #ffffffb3;
    border-radius: var(--radius-sm);
    padding: var(--space-2) 10px;
    background: #ffffff73;
    box-shadow: inset 0 1px 3px #273b5710;
    color: #25252a;
    font-size: var(--text-base); /* 16px：防 iOS 聚焦缩放 */
}

.cuican-alert-error {
    color: #b42332;
    font-size: 10px;
    margin-top: 6px;
    text-align: left;
}

.cuican-alert-demo-note {
    font-size: 9px;
    color: #66666c;
    margin-top: 10px;
}

.cuican-alert-actions {
    display: flex;
    gap: var(--space-2);
    padding: 0 12px 12px;
}

.cuican-alert-actions button {
    flex: 1;
    border: 1px solid #ffffff80;
    border-radius: 22px;
    min-height: 44px;
    padding: 10px var(--space-1);
    background: #ffffff60;
    color: #0064dc;
    font-size: var(--text-sm);
    transition: background 0.2s, transform 0.15s;
}

.cuican-alert-actions button:hover {
    background: #ffffffa6;
}

.cuican-alert-actions button:active {
    transform: scale(0.97);
}

.cuican-alert-actions .cuican-primary {
    background: linear-gradient(180deg, #1886f5, #0669df);
    border-color: #ffffff40;
    color: #fff;
    font-weight: var(--fw-semibold);
}

.cuican-alert-actions .cuican-primary:hover {
    background: linear-gradient(180deg, #2895ff, #0875ee);
}

/* 演示动画状态类 */
.demo-progress {
    height: 3px;
    margin-top: 10px;
    border-radius: 3px;
    background: #d7e1f1;
    overflow: hidden;
}

.demo-progress-bar {
    display: block;
    width: 0;
    height: 100%;
    border-radius: 3px;
    background: linear-gradient(90deg, #1886f5, #285ce5);
    transition: width 0.35s linear;
}

.demo-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0 15px 14px;
    font-size: 10px;
    color: #5b6b86;
}

.demo-spinner {
    width: 13px;
    height: 13px;
    border: 2px solid #c3d3ee;
    border-top-color: var(--blue);
    border-radius: 50%;
    animation: demo-spin 0.7s linear infinite;
}

@keyframes demo-spin {
    to {
        transform: rotate(360deg);
    }
}

.cuican-ios-alert.demo-announce .cuican-alert-content > p,
.cuican-ios-alert.demo-update .cuican-alert-content > p {
    text-align: left;
}

.cuican-ios-alert.demo-announce {
    border-color: #ffffffd9;
}

.cuican-ios-alert.demo-update .cuican-alert-content h3 {
    color: var(--blue);
}

.demo-toast {
    margin-top: 10px;
    padding: 7px 11px;
    border: 1px solid #dbe4f3;
    border-radius: var(--radius-sm);
    background: #f2f6ff;
    color: #3f5a90;
    font-size: 10px;
    text-align: left;
}

/* 屏幕在"回到应用"时的状态 */
.cuican-screen:not(.cuican-has-alert) .cuican-alert-layer {
    display: none;
}

/* ------------------------------------------------------- 07 演示控件 */
.cuican-demo-controls {
    position: relative;
    z-index: 4;
    width: min(100%, 350px);
    margin-top: 30px;
    padding: 17px;
    border: 1px solid #fff;
    border-radius: 22px;
    background: #ffffffbd;
    box-shadow: 0 12px 30px #3b588510;
}

.cuican-demo-control-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-3);
}

.cuican-demo-control-heading strong {
    font-size: var(--text-xs);
}

.cuican-demo-control-heading span {
    font-size: 9px;
    color: #50719b;
    padding: 3px 7px;
    background: #edf3ff;
    border-radius: 20px;
}

.cuican-scenario-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 5px;
    padding: var(--space-1);
    border-radius: 13px;
    background: #eaf0f8;
}

.cuican-scenario-grid + .cuican-scenario-grid {
    margin-top: var(--space-2);
}

.cuican-scenario-grid button {
    min-height: 39px;
    border: 1px solid transparent;
    border-radius: 9px;
    background: none;
    color: #65748a;
    font-size: 11px;
    padding: 6px 2px;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.cuican-scenario-grid button[aria-pressed="true"] {
    background: #fff;
    color: #245bd2;
    border-color: #dce5f5;
    box-shadow: 0 2px 6px #314f8710;
}

.cuican-scenario-grid button[data-scene="deleted"][aria-pressed="true"],
.cuican-scenario-grid button[data-scene="disabled"][aria-pressed="true"],
.cuican-scenario-grid button[data-scene="expired"][aria-pressed="true"],
.cuican-scenario-grid button[data-scene="missing"][aria-pressed="true"],
.cuican-scenario-grid button[data-scene="bound"][aria-pressed="true"],
.cuican-scenario-grid button[data-scene="stopped"][aria-pressed="true"],
.cuican-scenario-grid button[data-scene="nodisplay"][aria-pressed="true"] {
    color: #a74a43;
}

.cuican-demo-scene-note {
    min-height: 42px;
    margin-top: var(--space-3);
    font-size: 10px;
    line-height: 1.8;
}

.cuican-demo-tools {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid #e1e8f2;
    margin-top: 10px;
    padding-top: 5px;
}

.cuican-demo-tools button {
    border: 0;
    background: none;
    color: #4568b0;
    min-height: 36px;
    font-size: 11px;
}

.cuican-device-tag {
    position: absolute;
    right: -8px;
    top: 118px;
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 13px 17px;
    border: 1px solid #fff;
    border-radius: var(--radius-md);
    background: #ffffffcf;
    box-shadow: 0 10px 35px #5071a416;
    pointer-events: none;
}

.cuican-device-tag svg {
    width: 24px;
    height: 24px;
    color: var(--blue);
}

.cuican-device-tag strong {
    display: block;
    font-size: 11px;
}

.cuican-device-tag small {
    font-size: 9px;
    color: #7c8aa1;
}

.cuican-device-caption {
    position: absolute;
    bottom: -17px;
    font-size: 10px;
    color: #6d7d98;
    letter-spacing: 0.08em;
}

/* --------------------------------------------------- 08 条带 / 区块 */
.cuican-intro-strip {
    border-top: 1px solid #dce4f0;
    border-bottom: 1px solid #dce4f0;
    background: #ffffff6b;
}

.cuican-intro-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    padding-block: var(--space-6);
}

.cuican-intro-inner p {
    font-size: 13px;
}

.cuican-intro-inner strong {
    color: var(--ink);
    font-weight: var(--fw-semibold);
}

.cuican-intro-tags {
    display: flex;
    gap: 29px;
    font-size: 10px;
    letter-spacing: 0.09em;
    color: #75839a;
}

.cuican-section {
    padding-block: 110px;
}

.cuican-section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-10);
    margin-bottom: 42px;
}

.cuican-section-heading h2 {
    margin-top: var(--space-4);
}

.cuican-section-heading > p {
    font-size: var(--text-sm);
    max-width: 340px;
    line-height: 1.9;
}

/* ------------------------------------------------------ 09 能力 bento */
.cuican-bento {
    display: grid;
    grid-template-columns: 1.15fr 1fr 1fr;
    gap: 18px;
}

.cuican-card {
    position: relative;
    padding: 30px;
    border: 1px solid #fff;
    border-radius: var(--radius);
    background: #fff;
    box-shadow: var(--shadow-1);
    overflow: hidden;
    transition: box-shadow 0.3s, border-color 0.3s;
}

.cuican-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(
        330px circle at var(--spot-x, 50%) var(--spot-y, 0),
        #e5edffb3,
        transparent 70%
    );
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.cuican-card:hover {
    border-color: #cbd9f4;
    box-shadow: var(--shadow-2);
}

.cuican-card:hover::before {
    opacity: 1;
}

.cuican-card h3 {
    font-size: var(--text-lg);
    letter-spacing: -0.025em;
    margin-bottom: var(--space-3);
}

.cuican-card p {
    font-size: 13px;
    line-height: 1.9;
}

.cuican-card-number {
    display: block;
    font-size: 10px;
    letter-spacing: 0.12em;
    color: #8492a9;
    margin-bottom: 27px;
}

.cuican-card-lead {
    grid-row: span 2;
    background: linear-gradient(145deg, #eef3ff, #fff);
    min-height: 486px;
}

.cuican-card-lead h3 {
    font-size: 27px;
}

.cuican-card-wide {
    grid-column: span 2;
    display: flex;
    gap: 30px;
    background: #edf2fa;
}

.cuican-shield-art {
    display: grid;
    place-items: center;
    height: 230px;
    position: relative;
}

.cuican-shield-art::before,
.cuican-shield-art::after {
    content: "";
    position: absolute;
    border-radius: 50%;
}

.cuican-shield-art::before {
    width: 174px;
    height: 174px;
    border: 1px solid #d8e3f6;
}

.cuican-shield-art::after {
    width: 215px;
    height: 215px;
    border: 1px dashed #d8e3f6;
    opacity: 0.7;
}

.cuican-shield-art svg {
    position: relative;
    z-index: 1;
    width: 117px;
    height: 139px;
    filter: drop-shadow(0 16px 12px #6e8ad42b);
}

.cuican-card-footnote {
    border-top: 1px solid #dce5f3;
    padding-top: var(--space-4);
    color: #6e7e98;
    font-size: 10px;
    letter-spacing: 0.07em;
}

.cuican-tiny-wave {
    width: 74px;
    height: 30px;
    margin-bottom: 19px;
    color: #6385d8;
}

.cuican-theme-samples {
    display: flex;
    gap: 6px;
    height: 30px;
    margin-bottom: 19px;
}

.cuican-theme-samples i {
    width: 27px;
    height: 27px;
    border: 3px solid #fff;
    border-radius: 9px;
    background: #dfe9fd;
    box-shadow: 0 0 0 1px #dee5f1;
}

.cuican-theme-samples i:nth-child(2) {
    background: #e1ddf6;
}

.cuican-theme-samples i:nth-child(3) {
    background: #22334f;
}

.cuican-build-art {
    position: relative;
    flex: 0 0 112px;
    width: 112px;
    height: 104px;
    display: grid;
    place-items: center;
}

.cuican-build-art::before,
.cuican-build-art::after {
    content: "";
    position: absolute;
    width: 63px;
    height: 63px;
    border-radius: 17px;
    background: #f8faff;
    border: 1px solid #e4ebf8;
}

.cuican-build-art::before {
    transform: rotate(-15deg) translate(-12px, -7px);
}

.cuican-build-art::after {
    background: #d8e3ff;
    transform: rotate(9deg) translate(7px, 4px);
}

.cuican-build-art span {
    position: relative;
    z-index: 1;
    font: var(--text-xs) ui-monospace, SFMono-Regular, Menlo, monospace;
    color: #4268c5;
    text-align: center;
    line-height: 1.3;
}

.cuican-security-more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    margin-top: 18px;
    color: var(--blue);
    font-size: 13px;
    font-weight: var(--fw-semibold);
}

/* ---------------------------------------------------------- 10 安全区 */
.cuican-security-section {
    background:
        radial-gradient(ellipse at 85% 15%, #e4eaff 0, transparent 55%),
        linear-gradient(180deg, #edf3fc, #f5f7fb);
    border-block: 1px solid #e4eaf4;
}

.cuican-security-banner {
    display: flex;
    align-items: center;
    gap: 26px;
    padding: var(--space-8);
    border: 1px solid #fff;
    border-radius: 26px;
    background: #ffffff80;
    margin-bottom: 22px;
}

.cuican-security-emblem {
    flex: 0 0 82px;
    padding: 14px;
    color: var(--blue);
    background: linear-gradient(135deg, #fff, #dce7ff);
    border-radius: 24px;
    box-shadow: 0 12px 30px #285ce512;
}

.cuican-security-banner h3 {
    font-size: clamp(19px, 2.4vw, 27px);
    margin: 10px 0;
}

.cuican-security-banner p {
    font-size: 13px;
}

.cuican-security-seal {
    margin-left: auto;
    color: #7183a2;
    font-size: 10px;
    letter-spacing: 0.15em;
    text-align: right;
    line-height: 2;
}

.cuican-security-seal strong {
    color: #4d6382;
}

.cuican-security-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-5);
}

.cuican-security-card {
    padding: 30px;
    border: 1px solid #fff;
    border-radius: 24px;
    background: #ffffffcf;
    box-shadow: 0 8px 30px #24355005;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.cuican-security-card:hover {
    border-color: #b8caf6;
    box-shadow: 0 16px 40px #285ce510;
}

.cuican-security-index {
    color: #7988a1;
    font-size: 9px;
    letter-spacing: 0.08em;
}

.cuican-security-card h3 {
    font-size: clamp(20px, 2.3vw, 28px);
    letter-spacing: -0.04em;
    margin: 30px 0 var(--space-3);
}

.cuican-security-label {
    display: inline-block;
    border-radius: 6px;
    padding: var(--space-1) 9px;
    background: #edf3ff;
    color: var(--blue);
    font-size: 11px;
}

.cuican-security-card p {
    margin-top: 22px;
    font-size: 13px;
    line-height: 1.9;
}

.cuican-security-card-foot {
    margin-top: 26px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
    color: #667a99;
    font-size: 11px;
}

.cuican-security-caption {
    margin-top: 22px;
    text-align: center;
    font-size: 11px;
}

/* ------------------------------------------------- 11 运行方式（tabs） */
.cuican-experience {
    background: linear-gradient(180deg, #edf2fa, #f5f7fb);
    border-block: 1px solid #e4eaf3;
}

.cuican-flow-layout {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 80px;
    align-items: center;
}

.cuican-flow-intro h2 {
    margin-top: var(--space-4);
}

.cuican-flow-intro > p {
    margin-top: var(--space-4);
    font-size: var(--text-sm);
    line-height: 1.9;
}

.cuican-tabs {
    display: flex;
    gap: 5px;
}

.cuican-tab {
    border: 0;
    background: none;
    border-radius: var(--radius-sm);
    font-weight: var(--fw-medium);
    transition: background 0.25s, color 0.25s, box-shadow 0.25s;
}

.cuican-tab[aria-selected="true"] {
    background: #fff;
    color: var(--blue);
    box-shadow: 0 2px 7px #263d6510;
}

.cuican-flow-tabs {
    flex-direction: column;
    align-items: stretch;
    margin-top: 30px;
    gap: var(--space-2);
}

.cuican-flow-tabs .cuican-tab {
    text-align: left;
    padding: 15px 18px;
    font-size: var(--text-sm);
    color: #65758e;
    display: flex;
    align-items: center;
    gap: 17px;
    border: 1px solid transparent;
    border-radius: 14px;
}

.cuican-flow-tabs .cuican-tab span {
    font: 11px ui-monospace, SFMono-Regular, Menlo, monospace;
    color: #8393ac;
}

.cuican-flow-tabs .cuican-tab b {
    margin-left: auto;
    font-weight: var(--fw-regular);
}

.cuican-flow-tabs .cuican-tab[aria-selected="true"] {
    color: var(--blue);
    border-color: #fff;
    box-shadow: 0 8px 30px #36598609;
}

.cuican-flow-visual {
    padding: 34px;
    border-radius: 30px;
    background: #ffffffbd;
    border: 1px solid #fff;
    box-shadow: 0 20px 60px #36598609;
}

.cuican-flow-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 10px;
    color: #8190a7;
    letter-spacing: 0.1em;
    border-bottom: 1px solid #e5eaf3;
    padding-bottom: 18px;
}

.cuican-flow-panel {
    padding-top: 26px;
    min-height: 324px;
}

.cuican-flow-panel h3 {
    font-size: 23px;
    margin-bottom: 13px;
}

.cuican-flow-panel > p {
    font-size: 13px;
    line-height: 1.9;
}

.cuican-flow-route {
    display: grid;
    grid-template-columns: 1fr 24px 1fr;
    gap: var(--space-2);
    align-items: center;
    margin: 29px 0;
}

.cuican-flow-route > span {
    color: #92a6c9;
    text-align: center;
}

.cuican-flow-node {
    padding: 23px 10px;
    background: #f1f5fc;
    border: 1px solid #e3eaf6;
    border-radius: 17px;
    text-align: center;
}

.cuican-flow-node strong {
    display: block;
    font-size: 15px;
}

.cuican-flow-node span {
    display: block;
    color: #7889a3;
    font-size: 10px;
    margin-top: 6px;
}

.cuican-flow-note {
    font-size: 11px;
    padding-left: 13px;
    border-left: 2px solid #bbcffa;
}

/* --------------------------------------- 12 接入流程 / 代码 / FAQ / CTA */
.cuican-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 36px;
}

.cuican-steps li {
    padding-top: 25px;
    border-top: 1px solid #cfd9e9;
}

.cuican-steps h3 {
    font-size: 19px;
    margin-bottom: 13px;
}

.cuican-steps p {
    font-size: 13px;
    line-height: 1.95;
}

.cuican-step-number {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border: 1px solid #d5dfef;
    border-radius: 50%;
    font: 11px ui-monospace, SFMono-Regular, Menlo, monospace;
    color: #5775b0;
    margin-bottom: 23px;
}

.cuican-code {
    margin-top: 36px;
    border: 1px solid #e0e6f0;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #fff;
}

.cuican-code-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: 12px 18px;
    border-bottom: 1px solid #e8eef7;
    background: #f7fafe;
    font-size: 11px;
    color: #5a6b86;
}

.cuican-code-head span:last-child {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    color: #7b8ca6;
    overflow-wrap: anywhere;
    text-align: right;
}

.cuican-code pre {
    margin: 0;
    padding: 18px;
    overflow-x: auto;
    font: var(--text-xs) / 1.8 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    color: #2c3a52;
    background: #fdfefe;
}

.cuican-integration-note {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
    margin-top: 36px;
    padding: 21px 24px;
    border: 1px solid #e0e6f0;
    border-radius: 15px;
    font-size: var(--text-xs);
    background: #ffffffb3;
}

.cuican-integration-note a {
    color: var(--blue);
    font-weight: var(--fw-semibold);
    white-space: nowrap;
}

.cuican-faq-section {
    padding-top: 0;
}

.cuican-faq-layout {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 80px;
}

.cuican-faq-layout h2 {
    margin-top: var(--space-4);
}

.cuican-faq-list {
    border-top: 1px solid var(--line);
}

.cuican-faq-list details {
    border-bottom: 1px solid var(--line);
}

.cuican-faq-list summary {
    position: relative;
    cursor: pointer;
    padding: 23px 32px 23px 0;
    list-style: none;
    font-size: 15px;
    font-weight: var(--fw-medium);
}

.cuican-faq-list summary::-webkit-details-marker {
    display: none;
}

.cuican-faq-list summary::after {
    content: "+";
    position: absolute;
    right: var(--space-1);
    top: 22px;
    font-size: var(--text-lg);
    font-weight: 300;
    color: #7187ac;
}

.cuican-faq-list details[open] summary::after {
    content: "\2212"; /* − MINUS SIGN */
}

.cuican-faq-list details p {
    font-size: 13px;
    padding-bottom: var(--space-6);
    line-height: 1.9;
}

.cuican-cta {
    text-align: center;
    padding: 77px 30px;
    border-radius: 34px;
    border: 1px solid #fff;
    background:
        radial-gradient(ellipse at 20% 70%, #dce8ff, transparent 55%),
        radial-gradient(ellipse at 95% 20%, #e5dffc, transparent 55%),
        #eef3fc;
}

.cuican-cta h2 {
    margin: 17px 0 21px;
}

.cuican-cta p {
    font-size: var(--text-sm);
}

.cuican-cta .cuican-hero-actions {
    justify-content: center;
    margin-top: 28px;
}

/* ------------------------------------------------------------ 13 页脚 */
footer {
    padding: 36px 0;
    margin-top: var(--space-10);
}

.cuican-footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-6);
    font-size: 11px;
    color: #7b899e;
}

.cuican-footer-inner > span {
    overflow-wrap: anywhere;
}

.cuican-icp:hover,
.cuican-footer-friends a:hover {
    color: var(--blue);
}

.cuican-footer-friends {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
}

.cuican-footer-friends > span {
    color: #9aa6b8;
}

.cuican-footer-links {
    display: flex;
    align-items: center;
    gap: 23px;
    flex-shrink: 0;
}

.cuican-footer-links a:hover {
    color: var(--blue);
}

.cuican-copyright-trigger {
    padding: 0;
    border: 0;
    background: none;
    color: inherit;
    font: inherit;
}

.cuican-copyright-trigger:hover {
    color: var(--blue);
}

/* ------------------------------------------------------- 14 版权弹窗 */
.cuican-copyright-dialog {
    width: min(520px, calc(100% - 36px));
    max-height: calc(100vh - 40px);
    margin: auto;
    padding: 0;
    border: 1px solid #fff;
    border-radius: var(--radius);
    color: var(--ink);
    background: linear-gradient(145deg, #fff, #edf3ff);
    box-shadow: 0 30px 100px #263e6b33;
    overflow: auto;
}

.cuican-copyright-dialog::backdrop {
    background: #dce5f2cc;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.cuican-copyright-content {
    padding: clamp(24px, 5vw, 40px);
}

.cuican-copyright-content h2 {
    margin: var(--space-3) 0 var(--space-5);
    font-size: clamp(24px, 5vw, 32px);
}

.cuican-copyright-content p {
    margin-top: var(--space-3);
    font-size: 13px;
    line-height: 1.85;
}

.cuican-copyright-content .cuican-button {
    margin-top: var(--space-6);
    width: 100%;
}

.cuican-copyright-mark {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border: 1px solid #fff;
    border-radius: 17px;
    background: #dfe9ff;
    color: var(--blue);
    font-size: 26px;
    margin-bottom: 23px;
}

.cuican-copyright-domain {
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--line);
    border-radius: var(--space-3);
    background: #ffffffa6;
    overflow-wrap: anywhere;
    font-size: var(--text-xs);
}

.cuican-copyright-fallback {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 101;
    box-shadow: 0 0 0 100vmax #dce5f2f2, 0 30px 100px #263e6b33;
}

/* ------------------------------------------------- 15 入场动效 */
.cuican-reveal {
    opacity: 1;
}

.cuican-reveal.cuican-is-pending {
    opacity: 0;
    transform: translateY(20px);
}

.cuican-reveal.cuican-is-visible {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s, transform 0.7s;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }

    .cuican-phone {
        transform: none !important;
    }

    .cuican-reveal.cuican-is-pending {
        opacity: 1;
        transform: none;
    }
}

@media (prefers-reduced-transparency: reduce) {
    .cuican-ios-alert {
        background: #f2f5fb;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }
}

/* ================================================== 16 响应式断点 */

/* ---------- ≤1100px ---------- */
@media (max-width: 1100px) {
    .cuican-nav {
        gap: 19px;
    }

    .cuican-brand-name {
        max-width: 160px;
    }

    .cuican-device-tag {
        right: -3px;
        padding: 11px;
    }

    .cuican-hero {
        gap: var(--space-5);
    }

    .cuican-flow-layout,
    .cuican-faq-layout {
        gap: 45px;
    }

    .cuican-card,
    .cuican-security-card {
        padding: 25px;
    }
}

/* ---------- ≤900px ---------- */
@media (max-width: 900px) {
    .cuican-nav-shell {
        top: var(--space-3);
    }

    .cuican-nav {
        flex-wrap: wrap;
        gap: var(--space-3);
        padding: var(--space-3) var(--space-4);
        min-height: 66px;
    }

    .cuican-js-ready .cuican-menu-toggle {
        display: block;
        margin-left: auto;
    }

    .cuican-nav-links {
        width: 100%;
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-4) 22px;
        padding: 6px 0;
    }

    .cuican-js-ready .cuican-nav-links:not(.cuican-is-open) {
        display: none;
    }

    .cuican-hero {
        grid-template-columns: 1fr 1fr;
        min-height: 780px;
        padding-top: 150px;
        gap: 10px;
    }

    h1 {
        font-size: clamp(34px, 6.4vw, 52px);
    }

    .cuican-device-tag {
        display: none;
    }

    .cuican-phone {
        transform: rotateY(-5deg) rotateZ(1.5deg);
    }

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

    .cuican-card-lead {
        grid-row: span 1;
        min-height: 0;
    }

    .cuican-card-wide {
        grid-column: span 2;
    }

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

    .cuican-flow-layout,
    .cuican-faq-layout {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .cuican-section {
        padding-block: 78px;
    }
}

/* ---------- ≤700px ---------- */
@media (max-width: 700px) {
    .cuican-wrap,
    .cuican-no-script-note {
        width: calc(100% - 36px);
    }

    .cuican-nav {
        border-radius: 18px;
    }

    .cuican-brand {
        max-width: calc(100% - 78px);
    }

    .cuican-brand-name {
        max-width: 190px;
        font-size: var(--text-sm);
    }

    .cuican-nav-links {
        justify-content: flex-start;
    }

    .cuican-hero {
        grid-template-columns: 1fr;
        justify-items: center;
        text-align: center;
        min-height: 0;
        padding-top: 160px;
    }

    .cuican-js-ready .cuican-hero {
        padding-top: 135px;
    }

    h1 {
        font-size: clamp(32px, 9vw, 62px);
    }

    h2 {
        font-size: 34px;
    }

    .cuican-product-label,
    .cuican-hero-capabilities {
        justify-content: center;
    }

    .cuican-hero-description {
        max-width: none;
    }

    .cuican-hero-actions {
        justify-content: center;
    }

    .cuican-device-stage {
        width: 100%;
    }

    .cuican-phone {
        width: 268px;
        transform: none;
    }

    .cuican-screen {
        height: 496px;
        min-height: 496px;
    }

    .cuican-device-stage::before {
        display: none;
    }

    .cuican-intro-inner,
    .cuican-section-heading,
    .cuican-integration-note,
    .cuican-footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .cuican-intro-tags {
        flex-wrap: wrap;
        gap: var(--space-4);
    }

    .cuican-section-heading {
        gap: var(--space-5);
    }

    .cuican-section-heading > p {
        max-width: none;
    }

    .cuican-bento,
    .cuican-security-grid,
    .cuican-steps {
        grid-template-columns: 1fr;
    }

    .cuican-card-wide {
        grid-column: span 1;
        flex-direction: column;
    }

    .cuican-flow-tabs {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .cuican-flow-tabs .cuican-tab {
        flex: 1 1 130px;
        justify-content: center;
    }

    .cuican-flow-route {
        grid-template-columns: 1fr;
    }

    .cuican-flow-route > span {
        transform: rotate(90deg);
    }

    .cuican-security-banner {
        flex-wrap: wrap;
    }

    .cuican-security-seal {
        display: none;
    }

    .cuican-cta {
        padding: 55px 22px;
        border-radius: 25px;
    }

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

    .cuican-footer-links {
        flex-wrap: wrap;
        gap: var(--space-4);
    }
}