/* imToken — rstndt.com
   强交互 · 视觉冲击
   Inter + DM Sans
============================================ */

:root {
    --bg: #fcfcfc;
    --bg2: #f8f8f8;
    --bg3: #0f0f12;
    --tx: #1a1a1a;
    --tx2: #666;
    --tx3: #999;
    --txw: #f5f5f5;
    --bdr: rgba(0,0,0,.06);
    --bdr2: rgba(255,255,255,.12);
    --acc: #6366f1;
    --acc2: #8b5cf6;
    --acc-glow: rgba(99, 102, 241, .4);
    --font: 'DM Sans', -apple-system, sans-serif;
    --font2: 'Inter', sans-serif;
    --space: 1.5rem;
    --space-l: 2rem;
    --space-xl: 3rem;
    --w: 80rem;
    --w-n: 56rem;
    --pad-x: 2rem;
    --ease: cubic-bezier(.25,.1,.25,1);
    --ease-bounce: cubic-bezier(.34, 1.56, .64, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--tx); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

/* ========== 顶栏 ========== */
.hd {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(252,252,252,.9);
    border-bottom: 1px solid var(--bdr);
    backdrop-filter: blur(12px);
}

.hd__b {
    max-width: var(--w);
    margin: 0 auto;
    padding: var(--space) var(--pad-x);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hd__logo {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-weight: 600;
    font-size: 1.05rem;
}

.hd__logo img { width: 32px; height: 32px; border-radius: 8px; }

.hd__nav {
    display: flex;
    gap: 2rem;
}

.hd__nav a {
    font-size: .9rem;
    color: var(--tx2);
    position: relative;
    padding: .3rem 0;
    transition: color .25s, transform .25s var(--ease);
}

.hd__nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--acc), var(--acc2));
    transition: width .3s var(--ease);
}

.hd__nav a:hover {
    color: var(--tx);
    transform: translateY(-1px);
}

.hd__nav a:hover::after { width: 100%; }

.hd__dl {
    font-size: .9rem;
    font-weight: 600;
    padding: .55rem 1.25rem;
    background: linear-gradient(135deg, var(--acc), var(--acc2));
    color: #fff;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    transition: transform .25s var(--ease-bounce), box-shadow .25s;
}

.hd__dl:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--acc-glow);
}

.hd__dl-ic { width: 18px; height: 18px; opacity: .95; }

.hd__tg {
    display: none;
    width: 24px;
    height: 24px;
    border: none;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%231a1a1a'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M4 6h16M4 12h16M4 18h16'/%3E%3C/svg%3E") center/contain no-repeat;
    cursor: pointer;
}

.hd__mob {
    display: none;
    flex-direction: column;
    padding: 1rem var(--pad-x);
    gap: .75rem;
    border-top: 1px solid var(--bdr);
}

.hd__mob.is-open { display: flex; }

@media (max-width: 768px) {
    .hd__nav { display: none; }
    .hd__dl:not(.hd__mob .hd__dl) { display: none; }
    .hd__tg { display: block; }
}

/* ========== 首屏 ========== */
.mh {
    min-height: 100vh;
    padding: 6rem var(--pad-x) 4rem;
    position: relative;
    display: flex;
    align-items: center;
}

.mh__bg {
    position: absolute;
    inset: 0;
}

.mh__bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mh__veil {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15,15,18,.88) 0%, rgba(99,102,241,.15) 50%, rgba(15,15,18,.85) 100%);
}

.mh__c {
    position: relative;
    z-index: 1;
    max-width: var(--w);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.mh__k {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-size: .8rem;
    font-weight: 500;
    color: rgba(255,255,255,.8);
    letter-spacing: .08em;
    margin-bottom: .75rem;
}

.mh__k-ic {
    width: 16px;
    height: 16px;
    opacity: .9;
    filter: brightness(0) invert(1);
}

.mh__t {
    font-size: clamp(2.25rem, 4.5vw, 3.5rem);
    font-weight: 600;
    line-height: 1.15;
    color: #fff;
    letter-spacing: -.02em;
    margin-bottom: 1.25rem;
}

.mh__d {
    font-size: 1rem;
    color: rgba(255,255,255,.82);
    max-width: 24rem;
    margin-bottom: 2rem;
}

.mh__a { display: flex; gap: 1rem; flex-wrap: wrap; }

.mh__btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-size: .95rem;
    font-weight: 600;
    padding: .85rem 1.75rem;
    border-radius: 10px;
    transition: transform .25s var(--ease-bounce), box-shadow .25s, background .25s;
}

.mh__btn img { width: 20px; height: 20px; }

.mh__btn--p {
    background: linear-gradient(135deg, #fff 0%, #f0f0ff 100%);
    color: var(--tx);
}

.mh__btn--p:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(99,102,241,.25);
}

.mh__btn--s {
    background: rgba(255,255,255,.08);
    color: #fff;
    border: 2px solid rgba(255,255,255,.4);
}

.mh__btn--s:hover {
    background: rgba(255,255,255,.18);
    border-color: rgba(255,255,255,.6);
    transform: translateY(-2px);
}

.mh__ph {
    width: 220px;
    margin: 0 auto;
}

.mh__ph-i {
    position: relative;
    background: rgba(0,0,0,.5);
    border-radius: 28px;
    padding: 10px;
    aspect-ratio: 9/16;
    overflow: hidden;
    box-shadow: 0 24px 48px rgba(0,0,0,.4);
    transition: transform .4s var(--ease);
}

.mh__ph:hover .mh__ph-i { transform: scale(1.03); }

.mh__sl {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity .4s var(--ease);
}

.mh__sl--on { opacity: 1; z-index: 1; }

.mh__dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 12px;
}

.mh__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,.35);
    cursor: pointer;
    transition: background .3s, transform .3s var(--ease-bounce);
}

.mh__dot:hover { transform: scale(1.2); }

.mh__dot--on {
    background: #fff;
    transform: scale(1.25);
}

@media (max-width: 900px) {
    .mh__c { grid-template-columns: 1fr; text-align: center; }
    .mh__d { margin-left: auto; margin-right: auto; }
    .mh__a { justify-content: center; }
}

/* ========== 品牌 ========== */
.ab {
    padding: var(--space-xl) var(--pad-x);
    background: var(--bg2);
}

.ab__c {
    max-width: var(--w);
    margin: 0 auto;
    text-align: center;
}

.ab__logo {
    margin-bottom: 1.5rem;
}

.ab__logo img {
    margin: 0 auto;
    border-radius: 12px;
}

.ab__t {
    font-size: clamp(1.5rem, 2.5vw, 1.875rem);
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 1rem;
}

.ab__d {
    font-size: 1rem;
    color: var(--tx2);
}

/* ========== 产品 ========== */
.pd {
    padding: var(--space-xl) var(--pad-x);
}

.pd__w { max-width: var(--w); margin: 0 auto; }

.pd__h {
    text-align: center;
    margin-bottom: 2rem;
}

.pd__t {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: .5rem;
}

.pd__t-ic,
.sc__t-ic,
.gd__t-ic {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    color: var(--acc);
}

.ch__t-ic {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    filter: brightness(0) invert(1);
    opacity: .85;
}

.pd__ic {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, rgba(99,102,241,.12), rgba(139,92,246,.1));
    border-radius: 12px;
    margin-bottom: 1rem;
}

.pd__ic img { width: 24px; height: 24px; }

.pd__d {
    font-size: 1rem;
    color: var(--tx2);
}

.pd__r {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--bdr);
}

.pd__r:last-child { border-bottom: none; }

.pd__r--2 .pd__v { order: 2; }
.pd__r--2 .pd__b { order: 1; }

.pd__v {
    border-radius: 16px;
    overflow: hidden;
    transition: transform .4s var(--ease);
}

.pd__v:hover { transform: scale(1.02); }

.pd__v img { width: 100%; }

.pd__b h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: .75rem;
}

.pd__b p {
    font-size: .95rem;
    color: var(--tx2);
    line-height: 1.65;
}

@media (max-width: 768px) {
    .pd__r {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    .pd__r--2 .pd__v,
    .pd__r--2 .pd__b { order: unset; }
}

/* ========== 安全 ========== */
.sc {
    padding: var(--space-xl) var(--pad-x);
    background: var(--bg2);
}

.sc__w { max-width: var(--w); margin: 0 auto; }

.sc__h {
    text-align: center;
    margin-bottom: 2rem;
}

.sc__t {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: .5rem;
}

.sc__t-ic { width: 28px; height: 28px; color: var(--acc); }

.sc__ic {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--acc), var(--acc2));
    border-radius: 10px;
    margin-bottom: .75rem;
}

.sc__ic img {
    width: 20px;
    height: 20px;
    filter: brightness(0) invert(1);
}

.sc__d {
    font-size: 1rem;
    color: var(--tx2);
}

.sc__g {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.sc__i {
    padding: 1.5rem;
    background: #fff;
    border-radius: 16px;
    border: 1px solid var(--bdr);
    transition: transform .3s var(--ease-bounce), box-shadow .3s, border-color .3s;
}

.sc__i:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(99,102,241,.12);
    border-color: rgba(99,102,241,.2);
}

.sc__n {
    display: block;
    font-size: .75rem;
    font-weight: 500;
    color: var(--tx3);
    margin-bottom: .75rem;
}

.sc__i h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: .5rem;
}

.sc__i p {
    font-size: .9rem;
    color: var(--tx2);
    line-height: 1.6;
}

.sc__img {
    max-width: 70%;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
}

.sc__img img { width: 100%; }

@media (max-width: 768px) {
    .sc__g { grid-template-columns: 1fr; }
    .sc__img { max-width: 100%; }
}

@media (max-width: 640px) {
    :root { --pad-x: 1.25rem; }
}

@media (max-width: 480px) {
    .ch__b { grid-template-columns: repeat(2, 1fr); }
}

/* ========== 支持网络 ========== */
.ch {
    padding: var(--space-xl) var(--pad-x);
    background: var(--bg3);
    color: var(--txw);
}

.ch__w { max-width: var(--w); margin: 0 auto; text-align: center; }

.ch__t {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: .5rem;
}

.ch__t-ic { width: 24px; height: 24px; opacity: .9; }

.ch__d {
    font-size: .9rem;
    color: rgba(255,255,255,.7);
    margin-bottom: 1.5rem;
}

.ch__b {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: .75rem 1rem;
    justify-items: stretch;
}

@keyframes ch-fade {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.ch__item {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-size: .9rem;
    padding: .6rem 1rem;
    background: rgba(255,255,255,.06);
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,.08);
    transition: transform .25s var(--ease), background .25s, box-shadow .25s;
    animation: ch-fade .4s var(--ease) forwards;
    opacity: 0;
}

.ch__item:nth-child(1) { animation-delay: 0s; }
.ch__item:nth-child(2) { animation-delay: .04s; }
.ch__item:nth-child(3) { animation-delay: .08s; }
.ch__item:nth-child(4) { animation-delay: .12s; }
.ch__item:nth-child(5) { animation-delay: .16s; }
.ch__item:nth-child(6) { animation-delay: .2s; }
.ch__item:nth-child(7) { animation-delay: .24s; }
.ch__item:nth-child(8) { animation-delay: .28s; }
.ch__item:nth-child(9) { animation-delay: .32s; }

.ch__item:hover {
    background: rgba(255,255,255,.15);
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 32px rgba(0,0,0,.25), 0 0 0 1px rgba(255,255,255,.1);
}

.ch__item img {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    transition: transform .3s var(--ease);
}

.ch__item:hover img {
    transform: scale(1.15);
}

/* ========== 快速开始 ========== */
.gd {
    padding: var(--space-l) var(--pad-x);
}

.gd__w { max-width: var(--w); margin: 0 auto; }

.gd__t {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .6rem;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-align: center;
}

.gd__t-ic { width: 24px; height: 24px; color: var(--acc); }

.gd__ic {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, rgba(99,102,241,.1), rgba(139,92,246,.08));
    border-radius: 10px;
}

.gd__ic img { width: 18px; height: 18px; }

.gd__l {
    list-style: none;
    counter-reset: gd;
}

.gd__l li {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--bdr);
    counter-increment: gd;
    transition: background .2s, transform .2s;
}

.gd__l li:hover {
    background: rgba(99,102,241,.04);
    transform: translateX(4px);
}

.gd__l li::before {
    content: counter(gd);
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--acc), var(--acc2));
    color: #fff;
    border-radius: 8px;
}

.gd__l li:last-child { border-bottom: none; }

.gd__l strong { margin-right: .25rem; }

/* ========== FAQ ========== */
.fq {
    padding: var(--space-xl) var(--pad-x);
    background: var(--bg2);
}

.fq__w { max-width: var(--w); margin: 0 auto; }

.fq__t {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.fq__l { font-size: .95rem; }

.fq__i {
    border-bottom: 1px solid var(--bdr);
    transition: background .25s;
}

.fq__i:hover { background: rgba(99,102,241,.04); }

.fq__i.is-open { background: rgba(99,102,241,.06); }

.fq__i dt {
    margin: 0;
}

.fq__i button {
    width: 100%;
    padding: 1.25rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
    background: none;
    border: none;
    cursor: pointer;
    transition: color .2s;
}

.fq__i.is-open { background: rgba(99,102,241,.06); }

.fq__i button::after {
    content: '+';
    font-size: 1.25rem;
    color: var(--tx3);
}

.fq__i.is-open button::after { content: '−'; }

.fq__i dd {
    margin: 0;
    padding: 0 0 1.25rem;
    color: var(--tx2);
    line-height: 1.7;
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s var(--ease);
}

.fq__i.is-open dd { max-height: 12rem; }

/* ========== 下载 ========== */
.dl {
    padding: 3rem var(--pad-x);
    background: var(--bg3);
    color: var(--txw);
    text-align: center;
}

.dl__w { max-width: var(--w); margin: 0 auto; }

.dl__t {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: .5rem;
}

.dl__d {
    font-size: .9rem;
    color: rgba(255,255,255,.7);
    margin-bottom: 1.5rem;
}

.dl__b {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    flex-wrap: wrap;
}

.dl__b a {
    display: inline-flex;
    align-items: center;
    gap: .75rem;
    font-size: 1.05rem;
    font-weight: 600;
    padding: 1rem 2.25rem;
    background: rgba(255,255,255,.1);
    border: 2px solid rgba(255,255,255,.25);
    border-radius: 12px;
    transition: transform .25s var(--ease-bounce), background .25s, box-shadow .25s;
}

.dl__b a img {
    width: 24px;
    height: 24px;
    filter: brightness(0) invert(1);
}

.dl__b a:hover {
    background: rgba(255,255,255,.2);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,.3);
}

/* ========== 页脚 ========== */
.ft {
    padding: 2rem var(--pad-x);
    background: var(--bg3);
    color: var(--txw);
    font-size: .9rem;
}

.ft__w { max-width: var(--w); margin: 0 auto; }

.ft__t {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--bdr2);
}

.ft__logo {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-weight: 600;
}

.ft__logo img {
    width: 24px;
    height: 24px;
    border-radius: 6px;
}

.ft__n {
    display: flex;
    gap: 1.5rem;
}

.ft__n a {
    color: rgba(255,255,255,.8);
    transition: color .2s, transform .2s;
}

.ft__n a:hover {
    color: #fff;
    transform: translateX(2px);
}

.ft__idx {
    padding: 1.5rem 0;
    text-align: center;
}

.ft__idx a {
    color: rgba(255,255,255,.7);
}

.ft__idx a:hover { color: #fff; }

.ft__idx span {
    margin: 0 .5rem;
    color: rgba(255,255,255,.4);
}

.ft__c {
    text-align: center;
    color: rgba(255,255,255,.5);
    font-size: .8rem;
}

@media (max-width: 600px) {
    .ft__t { flex-direction: column; align-items: flex-start; }
}