:root {
    color-scheme: light;
    --blue-900: #0b2f6f;
    --blue-800: #124697;
    --blue-700: #1764d8;
    --blue-600: #1f7af2;
    --blue-500: #3697ff;
    --cyan-500: #19c7d9;
    --cyan-600: #11a9c2;
    --green-500: #18b875;
    --amber-500: #f4b23f;
    --coral-500: #f26a5b;
    --ink: #112033;
    --ink-soft: #43546c;
    --muted: #6b7a90;
    --line: #d8e8f8;
    --line-strong: #b7d6f4;
    --paper: #ffffff;
    --paper-blue: #f4faff;
    --paper-cyan: #ecfbff;
    --shadow: 0 22px 60px rgba(25, 85, 160, .16);
    --shadow-soft: 0 14px 38px rgba(27, 97, 170, .1);
    font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    line-height: 1.72;
}

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

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

h1,
h2,
h3,
p {
    margin-top: 0;
}

.container {
    width: min(1200px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid rgba(183, 214, 244, .78);
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(18px);
}

.nav {
    width: min(1200px, calc(100% - 40px));
    min-height: 72px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.brand-mark {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    background: var(--blue-700);
    color: #fff;
    font-size: 15px;
    font-weight: 950;
    box-shadow: 0 12px 26px rgba(23, 100, 216, .28);
}

.brand strong,
.brand small {
    display: block;
    letter-spacing: 0;
}

.brand strong {
    font-size: 18px;
    line-height: 1.15;
}

.brand small {
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    color: #40546e;
    font-size: 14px;
    font-weight: 850;
}

.nav-links a {
    position: relative;
    padding: 8px 0;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 2px;
    height: 2px;
    border-radius: 2px;
    background: var(--blue-600);
    opacity: 0;
    transform: scaleX(.45);
    transition: opacity .18s ease, transform .18s ease;
}

.nav-links a:hover::after,
.nav-links a.is-active::after {
    opacity: 1;
    transform: scaleX(1);
}

.nav-actions,
.hero-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-height: 44px;
    padding: 0 18px;
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 950;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    transition: transform .18s ease, background .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button-primary {
    background: var(--blue-700);
    color: #fff;
    box-shadow: 0 16px 34px rgba(23, 100, 216, .25);
}

.button-primary:hover {
    background: var(--blue-800);
}

.button-cyan {
    background: var(--cyan-500);
    color: #042f39;
    box-shadow: 0 16px 34px rgba(25, 199, 217, .24);
}

.button-cyan:hover {
    background: var(--cyan-600);
    color: #fff;
}

.button-soft {
    border-color: #c6ddf5;
    background: #eef7ff;
    color: var(--blue-800);
}

.button-soft:hover {
    border-color: #91c4f8;
    background: #e3f2ff;
}

.button-large {
    min-height: 54px;
    padding: 0 24px;
    font-size: 16px;
}

.button-icon {
    min-width: 34px;
    height: 28px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    background: rgba(255, 255, 255, .2);
    font-size: 12px;
    letter-spacing: 0;
}

.button-cyan .button-icon {
    background: rgba(255, 255, 255, .48);
}

.hero {
    position: relative;
    min-height: calc(82svh - 72px);
    overflow: hidden;
    background:
        linear-gradient(120deg, rgba(244, 250, 255, .96), rgba(236, 251, 255, .92) 44%, rgba(255, 255, 255, .9)),
        #f8fcff;
    border-bottom: 1px solid #d7ebfb;
    isolation: isolate;
}

.hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero::before {
    content: "";
    position: absolute;
    inset: auto 0 0;
    height: 44%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, .88));
    pointer-events: none;
}

.hero-wrap {
    width: min(1200px, calc(100% - 40px));
    min-height: calc(82svh - 72px);
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, .9fr) minmax(460px, 1.1fr);
    gap: 42px;
    align-items: center;
    padding: 56px 0 42px;
}

.hero-copy {
    position: relative;
    z-index: 2;
}

.eyebrow,
.section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    color: var(--blue-700);
    font-size: 14px;
    font-weight: 950;
}

.eyebrow::before,
.section-kicker::before {
    content: "";
    width: 32px;
    height: 3px;
    border-radius: 2px;
    background: var(--cyan-500);
}

h1 {
    margin-bottom: 20px;
    color: var(--blue-900);
    font-size: clamp(58px, 7vw, 106px);
    line-height: .95;
    letter-spacing: 0;
}

.hero-lead {
    max-width: 660px;
    margin-bottom: 30px;
    color: #30455f;
    font-size: 21px;
    line-height: 1.86;
}

.hero-proof {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.hero-proof span {
    min-height: 36px;
    display: inline-flex;
    align-items: center;
    padding: 0 12px;
    border: 1px solid #c8e3fb;
    border-radius: 8px;
    background: rgba(255, 255, 255, .78);
    color: var(--blue-800);
    font-size: 13px;
    font-weight: 900;
}

.hero-visual {
    position: relative;
    min-height: 540px;
}

.desktop-device,
.phone-device,
.visual-panel,
.power-card,
.compare-card,
.scene-grid article,
.download-card {
    border-radius: 8px;
}

.desktop-device {
    position: absolute;
    left: 0;
    top: 48px;
    width: 68%;
    min-height: 372px;
    padding: 26px;
    border: 1px solid rgba(120, 182, 237, .75);
    background: rgba(255, 255, 255, .8);
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.device-toolbar {
    height: 42px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 14px;
    margin-bottom: 32px;
    border-radius: 8px;
    background: #eef7ff;
}

.device-toolbar span {
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--blue-500);
}

.device-toolbar span:nth-child(2) {
    background: var(--cyan-500);
}

.device-toolbar span:nth-child(3) {
    background: var(--amber-500);
}

.desktop-title {
    margin-bottom: 24px;
    color: var(--blue-900);
    font-size: clamp(32px, 4vw, 54px);
    font-weight: 950;
    line-height: 1;
}

.desktop-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-bottom: 28px;
}

.desktop-grid i {
    height: 92px;
    border-radius: 8px;
    background:
        linear-gradient(180deg, #cfeaff 0 52%, #ffffff 52% 100%);
    border: 1px solid #d7e9fb;
    box-shadow: 0 10px 24px rgba(32, 104, 180, .09);
}

.desktop-flow {
    display: grid;
    grid-template-columns: 1fr 1.3fr .8fr;
    gap: 12px;
}

.desktop-flow b {
    height: 22px;
    border-radius: 8px;
    background: var(--blue-600);
}

.desktop-flow b:nth-child(2) {
    background: var(--cyan-500);
}

.desktop-flow b:nth-child(3) {
    background: var(--green-500);
}

.phone-device {
    position: absolute;
    right: 0;
    top: 0;
    width: 265px;
    height: 500px;
    padding: 18px;
    border: 1px solid rgba(50, 123, 197, .5);
    background: #fdfefe;
    box-shadow: 0 28px 70px rgba(24, 88, 160, .24);
}

.phone-screen {
    width: 100%;
    height: 100%;
    padding: 48px 22px 22px;
    border-radius: 8px;
    background: linear-gradient(180deg, #e8f6ff, #ffffff);
    border: 1px solid #d3e9fb;
}

.phone-title {
    margin-bottom: 8px;
    color: var(--blue-800);
    font-size: 40px;
    font-weight: 950;
    line-height: 1;
}

.phone-sub {
    margin-bottom: 28px;
    color: var(--blue-600);
    font-size: 30px;
    font-weight: 900;
    line-height: 1;
}

.phone-screen span {
    display: block;
    height: 40px;
    margin-bottom: 16px;
    border-radius: 8px;
    background:
        linear-gradient(90deg, var(--blue-600) 0 38%, transparent 38%),
        #edf7ff;
    border: 1px solid #d5eafb;
}

.phone-screen button {
    width: 100%;
    height: 52px;
    margin-top: 8px;
    border: 0;
    border-radius: 8px;
    background: var(--cyan-500);
    color: #05313a;
    font-size: 22px;
    font-weight: 950;
}

.link-beam {
    position: absolute;
    left: 58%;
    top: 240px;
    width: 22%;
    height: 8px;
    border-radius: 8px;
    background: repeating-linear-gradient(90deg, var(--cyan-500) 0 18px, transparent 18px 30px);
}

.intro-strip {
    padding: 24px 0;
    background: #ffffff;
}

.strip-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.strip-grid div {
    min-height: 96px;
    padding: 20px 22px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fbfdff;
    box-shadow: var(--shadow-soft);
}

.strip-grid strong,
.strip-grid span {
    display: block;
}

.strip-grid strong {
    color: var(--blue-800);
    font-size: 22px;
    line-height: 1.25;
}

.strip-grid span {
    margin-top: 8px;
    color: var(--muted);
    font-size: 14px;
}

.section {
    padding: 90px 0;
}

.section-white {
    background: #fff;
}

.section-soft {
    background: var(--paper-blue);
}

.section-blue {
    background:
        linear-gradient(135deg, #0f5ec6, #1797e8 62%, #19c7d9);
    color: #fff;
}

.section-blue .section-kicker,
.section-blue h2 {
    color: #fff;
}

.section-blue .section-kicker::before {
    background: #a8f4ff;
}

.split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(420px, .96fr);
    gap: 56px;
    align-items: center;
}

.split-reverse {
    grid-template-columns: minmax(420px, .96fr) minmax(0, 1fr);
}

.section-copy {
    max-width: 620px;
}

h2 {
    margin-bottom: 20px;
    color: var(--blue-900);
    font-size: clamp(36px, 4vw, 56px);
    line-height: 1.12;
    letter-spacing: 0;
}

.section-lead,
.section-head p,
.download-head p {
    color: var(--ink-soft);
    font-size: 18px;
}

.section-lead {
    margin-bottom: 26px;
}

.feature-list {
    display: grid;
    gap: 12px;
    margin-bottom: 30px;
}

.feature-list article {
    display: grid;
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
    padding: 16px 0;
    border-bottom: 1px solid #e3f0fb;
}

.feature-list strong {
    color: var(--blue-800);
    font-size: 17px;
    line-height: 1.45;
}

.feature-list span {
    color: var(--ink-soft);
}

.visual-panel {
    overflow: hidden;
    border: 1px solid var(--line);
    background: #f8fcff;
    box-shadow: var(--shadow);
}

.visual-panel img {
    width: 100%;
    height: auto;
}

.section-head {
    display: grid;
    grid-template-columns: minmax(0, .98fr) minmax(360px, .72fr);
    gap: 44px;
    align-items: end;
    margin-bottom: 36px;
}

.section-head p {
    margin-bottom: 0;
}

.section-blue .section-head p {
    color: rgba(255, 255, 255, .88);
}

.power-grid,
.compare-grid,
.download-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.power-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.power-card {
    min-height: 292px;
    padding: 26px;
    border: 1px solid rgba(255, 255, 255, .28);
    background: rgba(255, 255, 255, .13);
    backdrop-filter: blur(12px);
}

.power-icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    margin-bottom: 22px;
    border-radius: 8px;
    background: #fff;
    color: var(--blue-700);
    font-size: 14px;
    font-weight: 950;
}

.power-card h3 {
    margin-bottom: 12px;
    font-size: 25px;
    line-height: 1.25;
}

.power-card p {
    margin-bottom: 0;
    color: rgba(255, 255, 255, .84);
}

.compare-card {
    min-height: 348px;
    padding: 30px;
    border: 1px solid var(--line);
    background: #fff;
    box-shadow: var(--shadow-soft);
}

.compare-card > span,
.download-type {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 12px;
    margin-bottom: 22px;
    border-radius: 8px;
    background: #e7f3ff;
    color: var(--blue-800);
    font-size: 13px;
    font-weight: 950;
}

.compare-card:nth-child(2) > span,
.download-card-cyan .download-type {
    background: #e5fbff;
    color: #087f96;
}

.compare-card h3,
.download-card h3 {
    margin-bottom: 18px;
    color: var(--blue-900);
    font-size: 31px;
    line-height: 1.22;
}

.compare-card ul {
    display: grid;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.compare-card li {
    position: relative;
    padding-left: 24px;
    color: var(--ink-soft);
}

.compare-card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .72em;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--blue-600);
}

.compare-card:nth-child(2) li::before {
    background: var(--cyan-500);
}

.scene-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.scene-grid article {
    min-height: 160px;
    padding: 24px;
    border: 1px solid var(--line);
    background: linear-gradient(180deg, #ffffff, #f7fbff);
    box-shadow: var(--shadow-soft);
}

.scene-grid strong,
.scene-grid span {
    display: block;
}

.scene-grid strong {
    margin-bottom: 10px;
    color: var(--blue-800);
    font-size: 23px;
    line-height: 1.25;
}

.scene-grid span {
    color: var(--ink-soft);
}

.download-section {
    padding: 94px 0;
    background:
        linear-gradient(180deg, #eef8ff, #ffffff);
}

.download-head {
    max-width: 760px;
    margin-bottom: 34px;
}

.download-head h2 {
    margin-bottom: 14px;
}

.download-head p {
    margin-bottom: 0;
}

.download-card {
    min-height: 406px;
    padding: 34px;
    border: 1px solid #bddcf6;
    background: #ffffff;
    box-shadow: var(--shadow);
}

.download-card-cyan {
    border-color: #ace6ef;
    background: linear-gradient(180deg, #ffffff, #f2fdff);
}

.download-card p {
    margin-bottom: 24px;
    color: var(--ink-soft);
    font-size: 17px;
}

.download-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 28px;
}

.download-meta span {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 0 10px;
    border-radius: 8px;
    background: #f1f7fd;
    color: #52627a;
    font-size: 13px;
    font-weight: 850;
}

.site-footer {
    padding: 28px 0;
    border-top: 1px solid #dcebf8;
    background: #f8fcff;
    color: #5b6d84;
    font-size: 14px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.download-toast {
    position: fixed;
    left: 50%;
    bottom: 28px;
    z-index: 80;
    min-width: 220px;
    max-width: min(420px, calc(100% - 40px));
    padding: 13px 18px;
    border: 1px solid #b7d6f4;
    border-radius: 8px;
    background: rgba(255, 255, 255, .95);
    color: var(--blue-900);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, 18px);
    transition: opacity .2s ease, transform .2s ease;
    font-weight: 850;
    text-align: center;
}

.download-toast.is-visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

@media (max-width: 1100px) {
    .hero-wrap,
    .split,
    .split-reverse,
    .section-head {
        grid-template-columns: 1fr;
    }

    .hero-wrap {
        gap: 22px;
        padding-top: 44px;
    }

    .hero-visual {
        min-height: 480px;
    }

    .desktop-device {
        width: 72%;
    }

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

@media (max-width: 860px) {
    .nav-links {
        display: none;
    }

    .nav-actions .button-soft {
        display: none;
    }

    .hero {
        min-height: auto;
    }

    .hero-wrap {
        min-height: auto;
        padding: 46px 0 34px;
    }

    .hero-lead,
    .section-lead,
    .section-head p,
    .download-head p {
        font-size: 16px;
    }

    .hero-visual {
        min-height: 390px;
    }

    .desktop-device {
        top: 28px;
        width: 70%;
        min-height: 292px;
        padding: 18px;
    }

    .desktop-title {
        font-size: 34px;
    }

    .desktop-grid i {
        height: 68px;
    }

    .phone-device {
        width: 205px;
        height: 388px;
        padding: 12px;
    }

    .phone-screen {
        padding: 34px 15px 16px;
    }

    .phone-title {
        font-size: 32px;
        margin-bottom: 6px;
    }

    .phone-sub {
        margin-bottom: 18px;
        font-size: 24px;
    }

    .phone-screen span {
        height: 32px;
        margin-bottom: 12px;
    }

    .phone-screen button {
        height: 42px;
        font-size: 18px;
    }

    .strip-grid,
    .compare-grid,
    .download-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 68px 0;
    }
}

@media (max-width: 620px) {
    .container,
    .nav,
    .hero-wrap {
        width: min(100% - 28px, 1200px);
    }

    .nav {
        min-height: 66px;
    }

    .brand-mark {
        width: 36px;
        height: 36px;
        font-size: 13px;
    }

    .brand strong {
        font-size: 16px;
    }

    .button {
        min-height: 42px;
        padding: 0 13px;
        font-size: 13px;
    }

    .button-large {
        width: 100%;
        min-height: 50px;
        padding: 0 16px;
        font-size: 15px;
    }

    h1 {
        font-size: 54px;
    }

    h2 {
        font-size: 34px;
    }

    .hero-proof span {
        flex: 1 1 calc(50% - 10px);
        justify-content: center;
    }

    .hero-visual {
        min-height: 330px;
    }

    .desktop-device {
        width: 76%;
        min-height: 238px;
        padding: 14px;
    }

    .device-toolbar {
        height: 32px;
        margin-bottom: 20px;
    }

    .device-toolbar span {
        width: 10px;
        height: 10px;
    }

    .desktop-title {
        font-size: 26px;
        margin-bottom: 16px;
    }

    .desktop-grid {
        gap: 8px;
        margin-bottom: 18px;
    }

    .desktop-grid i {
        height: 52px;
    }

    .desktop-flow {
        gap: 8px;
    }

    .desktop-flow b {
        height: 16px;
    }

    .phone-device {
        width: 158px;
        height: 302px;
    }

    .phone-screen {
        padding: 28px 10px 12px;
    }

    .phone-title {
        font-size: 25px;
        margin-bottom: 4px;
    }

    .phone-sub {
        margin-bottom: 14px;
        font-size: 18px;
    }

    .phone-screen span {
        height: 26px;
        margin-bottom: 9px;
    }

    .phone-screen button {
        height: 36px;
        font-size: 16px;
    }

    .link-beam {
        display: none;
    }

    .feature-list article {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .power-grid,
    .scene-grid {
        grid-template-columns: 1fr;
    }

    .power-card,
    .compare-card,
    .download-card,
    .scene-grid article {
        min-height: auto;
        padding: 22px;
    }

    .footer-inner {
        display: block;
    }

    .footer-inner span {
        display: block;
    }

    .footer-inner span + span {
        margin-top: 6px;
    }
}