/* High-density page shell and software panel refinements. */
html {
    scroll-padding-top: 72px;
}

body {
    background: linear-gradient(135deg, #edf6ff 0%, #f7f1ff 52%, #fff5f3 100%);
}

body::before {
    background:
        radial-gradient(circle at 8% 18%, rgba(63, 138, 255, 0.2) 0%, transparent 32%),
        radial-gradient(circle at 88% 12%, rgba(168, 85, 247, 0.17) 0%, transparent 30%),
        radial-gradient(circle at 76% 82%, rgba(255, 122, 112, 0.13) 0%, transparent 32%),
        radial-gradient(circle at 22% 86%, rgba(34, 197, 169, 0.12) 0%, transparent 30%);
}

header {
    padding: 0.7rem 1rem;
    border-bottom: 1px solid rgba(117, 103, 225, 0.14);
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.97), rgba(250, 248, 255, 0.96));
    box-shadow: 0 3px 18px rgba(76, 61, 148, 0.1);
}

main {
    max-width: 1400px;
    margin-top: 72px;
    padding: 1.25rem 1rem 2rem;
}

section {
    margin-bottom: 1.25rem;
    padding: 1.75rem;
    border-color: rgba(205, 216, 238, 0.9);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 10px 32px rgba(68, 72, 132, 0.1);
}

section::before {
    height: 3px;
    background: linear-gradient(90deg, #448cff 0%, #8b5cf6 52%, #ff7a70 100%);
}

section:hover {
    transform: none;
    box-shadow: 0 12px 36px rgba(68, 72, 132, 0.13);
}

#download {
    padding: 1.4rem 1.5rem 1.5rem;
}

footer {
    position: static;
    padding: 0.65rem 1rem;
    box-shadow: 0 -1px 10px rgba(47, 68, 105, 0.06);
}

.mobile-quick-nav {
    display: none;
}

.footer-content p {
    margin: 0;
}

/* Compact third-party plan recommendations (Simplified Chinese page only). */
.plan-recommendations {
    padding: 1rem 1.15rem 1.1rem;
}

.plan-recommendations__header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.65rem;
}

.plan-recommendations__eyebrow {
    display: block;
    margin-bottom: 0.1rem;
    color: #6f63d8;
    font-size: 0.66rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.plan-recommendations h2 {
    margin: 0;
    padding: 0;
    color: #263653;
    font-size: 1.2rem;
    line-height: 1.25;
}

.plan-recommendations h2::before {
    display: none;
}

.plan-recommendations__hint {
    color: #8a96a8;
    font-size: 0.68rem;
    white-space: nowrap;
}

.plan-recommendations__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.65rem;
}

.plan-card {
    position: relative;
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 0.6rem;
    min-width: 0;
    padding: 0.72rem 2rem 0.72rem 0.72rem;
    overflow: hidden;
    border: 1px solid #dfe6f2;
    border-radius: 11px;
    background: #fff;
    color: #2e405c;
    text-decoration: none;
    box-shadow: 0 3px 11px rgba(58, 76, 126, 0.065);
    transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.plan-card::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 3px;
}

.plan-card--blue::before {
    background: linear-gradient(180deg, #3b8df3, #6b71e8);
}

.plan-card--green::before {
    background: linear-gradient(180deg, #20b99b, #4d94d8);
}

.plan-card--coral::before {
    background: linear-gradient(180deg, #f27c72, #bd62d9);
}

.plan-card:hover,
.plan-card:focus-visible {
    transform: translateY(-2px);
    border-color: #c4d4ed;
    color: #2e405c;
    box-shadow: 0 8px 20px rgba(62, 79, 145, 0.14);
}

.plan-card:focus-visible {
    outline: 2px solid #7aa7e4;
    outline-offset: 2px;
}

.plan-card__icon {
    display: inline-flex;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    border-radius: 9px;
}

.plan-card--blue .plan-card__icon {
    background: #e8f3ff;
    color: #347dd1;
}

.plan-card--green .plan-card__icon {
    background: #e5f9f4;
    color: #168b76;
}

.plan-card--coral .plan-card__icon {
    background: #ffedf0;
    color: #d65b70;
}

.plan-card__icon svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.65;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.plan-card__body,
.plan-card__title,
.plan-card__description {
    display: block;
    min-width: 0;
}

.plan-card__title {
    margin-bottom: 0.18rem;
    color: #2d405e;
    font-size: 0.86rem;
    font-weight: 700;
    line-height: 1.25;
}

.plan-card__description {
    color: #6c7b91;
    font-size: 0.69rem;
    line-height: 1.45;
}

.plan-card__description strong {
    color: #4c5fc1;
    font-weight: 700;
}

.plan-card__description code {
    padding: 0.05rem 0.25rem;
    border-radius: 4px;
    background: #edf2fb;
    color: #5a5dc0;
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.66rem;
}

.plan-card__badge {
    position: absolute;
    top: 0.58rem;
    right: 0.58rem;
    padding: 0.12rem 0.35rem;
    border-radius: 999px;
    background: #f1f5fb;
    color: #63718a;
    font-size: 0.57rem;
    font-weight: 700;
}

.plan-card__arrow {
    position: absolute;
    right: 0.62rem;
    bottom: 0.55rem;
    color: #7d8ca5;
    font-size: 0.78rem;
}

.software-hero {
    margin-bottom: 0.85rem;
}

.software-hero h2 {
    margin: 0 0 0.25rem;
    padding-left: 0.75rem;
    color: #263653;
    font-size: 1.8rem;
    line-height: 1.2;
}

.software-hero h2::before {
    width: 3px;
    background: linear-gradient(180deg, #3b82f6, #8b5cf6, #fb7185);
}

.software-hero p {
    margin: 0;
    color: #718096;
    font-size: 0.88rem;
}

.software-card-grid {
    align-items: stretch;
    gap: 0.7rem;
}

.software-card-grid--more {
    margin-top: 0.55rem;
}

.software-card {
    min-height: 150px;
    padding: 0.85rem;
    border-color: #d7e4f8;
    border-radius: 12px;
    background: linear-gradient(145deg, #ffffff, #f9fbff);
    box-shadow: 0 4px 13px rgba(52, 80, 145, 0.07);
    transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.software-card-grid:not(.software-card-grid--more) .software-card:first-child {
    border-top: 2px solid #4d9cff;
}

.software-card-grid:not(.software-card-grid--more) .software-card:nth-child(2) {
    border-top: 2px solid #9b6df4;
}

.software-card--more {
    min-height: 112px;
    border-color: #e2e6f2;
    background: linear-gradient(145deg, #fff, #fdfbff);
}

.software-card:hover {
    transform: translateY(-2px);
    border-color: #b9cff1;
    box-shadow: 0 9px 22px rgba(68, 92, 160, 0.14);
}

.software-card__head {
    gap: 0.6rem;
}

.software-card__icon {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
    border-radius: 9px;
    background: #f0f6ff;
    color: #628dcc;
    font-size: 1.05rem;
}

.software-card__icon svg {
    width: 19px;
    height: 19px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: transform 0.22s ease;
}

.software-card:hover .software-card__icon svg {
    transform: scale(1.08) rotate(-3deg);
}

.software-card__icon--android {
    background: linear-gradient(145deg, #dff1ff, #e9f8ff);
    color: #1877d2;
}

.software-card__icon--ios {
    background: linear-gradient(145deg, #eee8ff, #f7edff);
    color: #8250d0;
}

.software-card__icon--legacy {
    background: linear-gradient(145deg, #fff1db, #fff8e8);
    color: #d28322;
}

.software-card__icon--sim {
    background: linear-gradient(145deg, #ddfaf3, #eafcf6);
    color: #15987e;
}

.software-card__icon--desktop {
    background: linear-gradient(145deg, #ffe9ed, #fff1f4);
    color: #d95772;
}

.software-card--more .software-card__icon {
    width: 34px;
    height: 34px;
    flex-basis: 34px;
    border-radius: 8px;
    background: #f6f8fb;
    font-size: 0.95rem;
}

.software-card h3 {
    color: #2b3d57;
    font-size: 0.98rem;
    line-height: 1.3;
}

.software-card p {
    margin: 0.2rem 0 0.4rem;
    color: #748398;
    font-size: 0.78rem;
    line-height: 1.35;
}

.software-tags {
    gap: 0.3rem;
}

.software-tag {
    padding: 0.15rem 0.4rem;
    border-color: #dce6f5;
    background: linear-gradient(135deg, #f3f7ff, #f8f3ff);
    color: #5a6f91;
    font-size: 0.63rem;
}

.software-card__actions {
    order: 2;
    flex-wrap: nowrap;
    gap: 0.4rem;
    margin-top: auto;
    padding-top: 0.5rem;
}

.software-action {
    min-height: 34px;
    padding: 0.38rem 0.62rem;
    border-color: transparent;
    border-radius: 7px;
    background: linear-gradient(135deg, #438bf1, #7367e8);
    color: #fff;
    font-size: 0.76rem;
    white-space: nowrap;
    box-shadow: 0 4px 10px rgba(72, 105, 218, 0.18);
}

.software-action--text {
    border-color: #d6e3f6;
    background: linear-gradient(135deg, #f0f6ff, #f7f2ff);
    color: #5274a9;
    box-shadow: none;
}

.software-action:hover,
.software-action:focus-visible {
    background: linear-gradient(135deg, #2879e8, #6554db);
    color: #fff;
    box-shadow: 0 6px 14px rgba(68, 89, 205, 0.26);
}

.software-action--text:hover,
.software-action--text:focus-visible {
    background: linear-gradient(135deg, #e5f0ff, #efe8ff);
    color: #3b67a5;
    box-shadow: none;
}

.software-section-title {
    margin: 1rem 0 0.15rem;
    color: #35445a;
    font-size: 1.12rem;
    line-height: 1.3;
}

.software-note {
    margin: 0 0 0.45rem;
    color: #78869a;
    font-size: 0.78rem;
}

.software-card__warning {
    order: 1;
    margin-top: 0.45rem;
    padding: 0.38rem 0.5rem;
    border-radius: 7px;
    border-left: 2px solid #f0b34e;
    background: linear-gradient(90deg, #fff7df, #fffaf0);
    color: #8a6120;
    font-size: 0.69rem;
    line-height: 1.35;
}

/* FAQ accordion cards */
#faq > h2 {
    margin: 0 0 0.25rem;
    padding-left: 0.75rem;
    color: #263653;
    font-size: 1.7rem;
    line-height: 1.25;
}

#faq > p {
    margin: 0 0 0.85rem;
    color: #748398;
    font-size: 0.85rem;
}

.faq-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
    gap: 0.65rem;
}

#faq .faq-item {
    min-width: 0;
    margin: 0;
    padding: 0;
    overflow: hidden;
    border: 1px solid #e0e6f2;
    border-left: 3px solid #5b91ec;
    border-radius: 11px;
    background: linear-gradient(145deg, #fff, #fafcff);
    box-shadow: 0 3px 10px rgba(53, 78, 119, 0.055);
    backdrop-filter: none;
}

#faq .faq-item:hover,
#faq .faq-item.active {
    transform: none;
    border-color: #bcd1f0;
    border-left-color: #765fe3;
    background: #fff;
    box-shadow: 0 7px 18px rgba(72, 77, 153, 0.12);
}

#faq .faq-item:nth-child(2n) {
    border-left-color: #9164df;
}

#faq .faq-item:nth-child(3n) {
    border-left-color: #2aa993;
}

#faq .faq-item:nth-child(4n) {
    border-left-color: #e87482;
}

#faq .faq-item h3 {
    display: flex;
    min-height: 48px;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin: 0;
    padding: 0.7rem 0.8rem;
    color: #354a68;
    font-size: 0.92rem;
    line-height: 1.35;
    cursor: pointer;
    box-sizing: border-box;
}

#faq .faq-item h3::after {
    content: '+';
    display: inline-flex;
    flex: 0 0 24px;
    width: 24px;
    height: 24px;
    align-items: center;
    justify-content: center;
    border: 1px solid #d4e0f4;
    border-radius: 50%;
    background: linear-gradient(145deg, #eef5ff, #f5efff);
    color: #6672c8;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1;
    transition: transform 0.2s ease, background 0.2s ease;
}

#faq .faq-item h3:focus-visible {
    outline: 2px solid #90b2df;
    outline-offset: -3px;
}

#faq .faq-item p {
    max-height: 0;
    margin: 0;
    padding: 0 0.8rem;
    overflow: hidden;
    color: #66758a;
    font-size: 0.8rem;
    line-height: 1.6;
    opacity: 0;
    transition: max-height 0.25s ease, padding 0.25s ease, opacity 0.2s ease;
}

#faq .faq-item.active h3 {
    color: #5d55c7;
}

#faq .faq-item.active h3::after {
    transform: rotate(45deg);
    border-color: transparent;
    background: linear-gradient(135deg, #528ef0, #8a5be1);
    color: #fff;
}

#faq .faq-item.active p {
    max-height: 240px;
    padding: 0 0.8rem 0.8rem;
    opacity: 1;
}

@media (min-width: 901px) {
    .software-card-grid--more .software-card__actions {
        padding-top: 0.3rem;
    }
}

@media (max-width: 768px) {
    html {
        scroll-padding-top: 64px;
    }

    header {
        padding: 0.55rem 0.75rem;
    }

    main {
        margin-top: 104px;
        padding: 0.65rem 0.5rem 1.25rem;
    }

    .mobile-quick-nav {
        position: fixed;
        top: 62px;
        left: 0;
        right: 0;
        z-index: 95;
        display: flex;
        height: 42px;
        align-items: center;
        gap: 0.3rem;
        padding: 0.3rem 0.5rem;
        overflow-x: auto;
        border-top: 1px solid #edf1f7;
        border-bottom: 1px solid #dcdff0;
        background: linear-gradient(90deg, rgba(247, 251, 255, 0.97), rgba(250, 246, 255, 0.97));
        box-shadow: 0 4px 12px rgba(75, 67, 152, 0.09);
        box-sizing: border-box;
        scrollbar-width: none;
        backdrop-filter: blur(12px);
    }

    .mobile-quick-nav::-webkit-scrollbar {
        display: none;
    }

    .mobile-quick-nav a {
        display: inline-flex;
        flex: 1 0 auto;
        min-height: 30px;
        align-items: center;
        justify-content: center;
        padding: 0.25rem 0.65rem;
        border-radius: 7px;
        color: #596b8d;
        font-size: 0.72rem;
        font-weight: 600;
        line-height: 1;
        text-decoration: none;
        white-space: nowrap;
    }

    .mobile-quick-nav a.active {
        background: linear-gradient(135deg, #4c91f3, #7965e5);
        color: #fff;
        box-shadow: 0 3px 8px rgba(83, 94, 210, 0.2);
    }

    .mobile-quick-nav a:active {
        background: linear-gradient(135deg, #3b83e9, #6d58da);
        color: #fff;
    }

    section,
    #download {
        margin-bottom: 0.75rem;
        padding: 0.9rem;
        border-radius: 12px;
    }

    .plan-recommendations {
        padding: 0.75rem;
    }

    .plan-recommendations__header {
        align-items: flex-start;
        margin-bottom: 0.5rem;
    }

    .plan-recommendations h2 {
        font-size: 1.02rem;
    }

    .plan-recommendations__hint {
        max-width: 110px;
        font-size: 0.58rem;
        line-height: 1.35;
        text-align: right;
        white-space: normal;
    }

    .plan-recommendations__grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.5rem;
        margin: 0;
        padding: 0;
        overflow: visible;
    }

    .plan-card {
        width: 100%;
        padding-top: 0.65rem;
        padding-bottom: 0.65rem;
        box-sizing: border-box;
    }

    footer {
        position: static;
        padding: 0.55rem 0.4rem;
    }

    .software-hero {
        margin-bottom: 0.65rem;
    }

    .software-hero h2 {
        margin-bottom: 0.2rem;
        padding-left: 0.6rem;
        font-size: 1.45rem;
    }

    .software-hero p {
        font-size: 0.77rem;
        line-height: 1.45;
    }

    .software-card-grid,
    .software-card-grid--more {
        gap: 0.55rem;
    }

    .software-card,
    .software-card--more {
        min-height: 0;
        padding: 0.72rem;
    }

    .software-card__icon {
        width: 34px;
        height: 34px;
        flex-basis: 34px;
    }

    .software-card h3 {
        font-size: 0.92rem;
    }

    .software-card p {
        font-size: 0.74rem;
    }

    .software-card__actions {
        justify-content: flex-start;
        padding-top: 0.4rem;
    }

    .software-action,
    .software-action:not(.software-action--text) {
        flex: 0 1 auto;
        width: auto;
        min-height: 36px;
        padding: 0.4rem 0.58rem;
        font-size: 0.72rem;
    }

    .software-section-title {
        margin-top: 0.8rem;
        font-size: 1.02rem;
    }

    .software-note {
        font-size: 0.74rem;
        line-height: 1.4;
    }

    .software-card__warning {
        font-size: 0.66rem;
    }

    #faq > h2 {
        padding-left: 0.6rem;
        font-size: 1.4rem;
    }

    #faq > p {
        margin-bottom: 0.6rem;
        font-size: 0.76rem;
        line-height: 1.45;
    }

    .faq-list {
        grid-template-columns: 1fr;
        gap: 0.45rem;
    }

    #faq .faq-item {
        padding: 0;
    }

    #faq .faq-item h3 {
        min-height: 44px;
        padding: 0.6rem 0.7rem;
        font-size: 0.84rem;
    }

    #faq .faq-item p {
        padding-right: 0.7rem;
        padding-left: 0.7rem;
        font-size: 0.75rem;
    }

    #faq .faq-item.active p {
        padding: 0 0.7rem 0.7rem;
    }
}

@media (max-width: 380px) {
    .software-card__actions {
        flex-wrap: wrap;
    }
}

@media (prefers-reduced-motion: reduce) {
    .software-card,
    .software-card__icon svg,
    #faq .faq-item,
    #faq .faq-item p {
        transition: none;
    }
}