/* ==================== Reset & Variables ==================== */
:root {
    --color-primary: #FF6B35;
    --color-primary-dark: #E55A2B;
    --color-secondary: #FFA726;
    --color-accent: #FFD54F;
    --color-green: #4CAF50;
    --color-purple: #7C4DFF;
    --color-pink: #FF4081;
    --color-blue: #448AFF;
    --color-teal: #26A69A;

    --color-bg: #FFFDF7;
    --color-bg-alt: #FFF8EC;
    --color-bg-dark: #1A1A2E;
    --color-text: #2D3436;
    --color-text-light: #636E72;
    --color-text-white: #FFFFFF;
    --color-border: #F0E6D3;

    --font-main: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --shadow-sm: 0 2px 8px rgba(255, 107, 53, 0.08);
    --shadow-md: 0 4px 20px rgba(255, 107, 53, 0.12);
    --shadow-lg: 0 8px 40px rgba(255, 107, 53, 0.15);
    --shadow-xl: 0 20px 60px rgba(255, 107, 53, 0.2);

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    --max-width: 1200px;
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ==================== Navigation ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
    padding: 4px 0;
}

.header.scrolled {
    background: rgba(255, 253, 247, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text);
    z-index: 10;
}

.nav__logo-icon {
    font-size: 1.8rem;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav__link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-light);
    transition: var(--transition);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 10;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

.nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-text-white);
    box-shadow: 0 4px 16px rgba(255, 107, 53, 0.4);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 107, 53, 0.5);
}

.btn--outline {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn--outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(255, 107, 53, 0.05);
}

/* ==================== Hero Section ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero__bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero__circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.hero__circle--1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    top: -200px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.hero__circle--2 {
    width: 400px;
    height: 400px;
    background: var(--color-secondary);
    bottom: -100px;
    left: -100px;
    animation: float 10s ease-in-out infinite reverse;
}

.hero__circle--3 {
    width: 200px;
    height: 200px;
    background: var(--color-accent);
    top: 40%;
    left: 50%;
    animation: float 7s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-30px) scale(1.05); }
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero__badge {
    display: inline-block;
    background: rgba(255, 107, 53, 0.1);
    color: var(--color-primary);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero__title {
    font-size: 3.2rem;
    font-weight: 900;
    line-height: 1.25;
    margin-bottom: 20px;
    color: var(--color-text);
}

.hero__title-highlight {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__desc {
    font-size: 1.1rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 480px;
}

.text-bold {
    font-weight: 700;
    color: var(--color-primary);
}

.hero__actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero__stats {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

.hero__stat {
    display: flex;
    flex-direction: column;
}

.hero__stat-num {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--color-primary);
    line-height: 1.2;
}

.hero__stat-label {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* ==================== Hero Phone (Real Screenshot) ==================== */
.hero__mockup {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-phone {
    width: 260px;
    height: 520px;
    border-radius: 36px;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(255, 107, 53, 0.25), 0 0 0 3px #333, 0 0 0 6px #555;
    position: relative;
    transform: rotate(-3deg);
    animation: phoneFloat 6s ease-in-out infinite;
}

.hero-phone__img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    opacity: 0;
    transition: opacity 0.5s ease;
    position: absolute;
    inset: 0;
}

.hero-phone__img--active {
    opacity: 1;
}

.hero-phone__dots {
    display: flex;
    gap: 8px;
    margin-top: 20px;
}

.hero-phone__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 107, 53, 0.2);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
}

.hero-phone__dot.active,
.hero-phone__dot:hover {
    background: var(--color-primary);
    transform: scale(1.2);
}

/* ==================== Section Common ==================== */
.section {
    padding: 100px 0;
}

.section__header {
    text-align: center;
    margin-bottom: 64px;
}

.section__tag {
    display: inline-block;
    background: rgba(255, 107, 53, 0.1);
    color: var(--color-primary);
    padding: 6px 18px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.section__title {
    font-size: 2.4rem;
    font-weight: 900;
    margin-bottom: 12px;
    color: var(--color-text);
}

.section__desc {
    font-size: 1.05rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ==================== Features ==================== */
.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card__icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 20px;
}

.feature-card__icon--orange { background: rgba(255, 107, 53, 0.1); }
.feature-card__icon--green { background: rgba(76, 175, 80, 0.1); }
.feature-card__icon--purple { background: rgba(124, 77, 255, 0.1); }
.feature-card__icon--pink { background: rgba(255, 64, 129, 0.1); }
.feature-card__icon--blue { background: rgba(68, 138, 255, 0.1); }
.feature-card__icon--teal { background: rgba(38, 166, 154, 0.1); }

.feature-card__title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card__desc {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ==================== Screenshots Section ==================== */
.screenshots {
    background: var(--color-bg-alt);
}

.screenshots__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.screenshot-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.screenshot-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.screenshot-card img {
    width: 100%;
    height: auto;
    display: block;
}

/* ==================== Earn Section ==================== */
.earn {
    background: var(--color-bg-alt);
}

.earn__cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.earn-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.earn-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.earn-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.earn-card__icon {
    font-size: 2rem;
}

.earn-card__coin {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.earn-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.earn-card p {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 16px;
    line-height: 1.6;
}

.earn-card__progress {
    background: rgba(255, 107, 53, 0.06);
    border-radius: var(--radius-sm);
    padding: 10px;
}

.earn-card__day {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
}

/* ==================== Shop Section ==================== */
.shop__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.shop-item {
    background: white;
    border-radius: var(--radius-md);
    padding: 28px 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
    position: relative;
}

.shop-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.shop-item__img {
    font-size: 2.8rem;
    margin-bottom: 12px;
}

.shop-item__name {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.shop-item__price {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-primary);
}

.shop-item__tag {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--color-primary);
    color: white;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
}

.shop-item__tag--hot {
    background: var(--color-pink);
}

.shop-item__tag--new {
    background: var(--color-green);
}

/* ==================== Testimonials ==================== */
.testimonials {
    background: var(--color-bg-alt);
}

.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.testimonial-card__stars {
    font-size: 1rem;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.testimonial-card__text {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-card__user {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.testimonial-card__avatar {
    width: 44px;
    height: 44px;
    background: var(--color-bg-alt);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.testimonial-card__name {
    font-size: 0.9rem;
    font-weight: 600;
}

.testimonial-card__level {
    font-size: 0.78rem;
    color: var(--color-primary);
    font-weight: 500;
}

/* ==================== Download Section ==================== */
.download {
    position: relative;
    overflow: hidden;
}

.download__bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #1A1A2E 0%, #2D2D44 50%, #1A1A2E 100%);
    pointer-events: none;
}

.download__circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.05;
}

.download__circle--1 {
    width: 500px;
    height: 500px;
    background: var(--color-primary);
    top: -150px;
    right: -100px;
}

.download__circle--2 {
    width: 300px;
    height: 300px;
    background: var(--color-secondary);
    bottom: -80px;
    left: -60px;
}

.download__container {
    position: relative;
    z-index: 1;
    padding: 80px 24px;
}

.download__content {
    text-align: center;
}

.download__title {
    font-size: 2.4rem;
    font-weight: 900;
    color: white;
    margin-bottom: 12px;
}

.download__desc {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
}

.download__buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 14px;
    font-family: var(--font-main);
    transition: var(--transition);
}

.download-btn--ios {
    background: white;
    color: #1A1A2E;
}

.download-btn--ios:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255,255,255,0.2);
}

.download-btn--android {
    background: rgba(255,255,255,0.1);
    color: white;
    border: 1px solid rgba(255,255,255,0.2);
}

.download-btn--android:hover {
    background: rgba(255,255,255,0.15);
    transform: translateY(-2px);
}

.download-btn small {
    font-size: 0.7rem;
    display: block;
    line-height: 1.2;
}

.download-btn strong {
    font-size: 1.05rem;
    font-weight: 700;
}

.download__qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.qr-code {
    width: 100px;
    height: 100px;
    background: white;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-code__inner {
    text-align: center;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
}

.download__qr-label {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

/* ==================== Footer ==================== */
.footer {
    background: var(--color-bg-dark);
    color: white;
    padding: 60px 0 24px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer__desc {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
    line-height: 1.7;
}

.footer__links h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: white;
}

.footer__links a {
    display: block;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer__links a:hover {
    color: var(--color-primary);
}

.footer__bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 0.85rem;
    color: rgba(255,255,255,0.3);
    line-height: 2;
}

.footer__bottom a {
    color: rgba(255,255,255,0.3);
    transition: var(--transition);
}

.footer__bottom a:hover {
    color: var(--color-primary);
}

.footer__company {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

.footer__info {
    font-size: 0.82rem;
}

.footer__divider {
    margin: 0 10px;
    color: rgba(255,255,255,0.15);
}

.footer__copyright {
    font-size: 0.8rem;
    margin-top: 4px;
}

/* ==================== Animations ==================== */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

[data-aos="fade-up"] {
    transform: translateY(40px);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}

/* ==================== Responsive Design ==================== */

/* Tablet */
@media (max-width: 1024px) {
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero__desc {
        max-width: 100%;
    }

    .hero__actions {
        justify-content: center;
    }

    .hero__stats {
        justify-content: center;
    }

    .hero__mockup {
        order: -1;
    }

    .hero-phone {
        width: 220px;
        height: 440px;
        transform: rotate(0);
        animation: none;
    }

    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .earn__cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .shop__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .testimonials__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .screenshots__arrow {
        display: none;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .hero__title {
        font-size: 2rem;
    }

    .hero__desc {
        font-size: 0.95rem;
    }

    .hero__stats {
        gap: 24px;
    }

    .hero__stat-num {
        font-size: 1.4rem;
    }

    .section__title {
        font-size: 1.7rem;
    }

    .section__desc {
        font-size: 0.9rem;
    }

    .features__grid {
        grid-template-columns: 1fr;
    }

    .earn__cards {
        grid-template-columns: 1fr;
    }

    .shop__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .testimonials__grid {
        grid-template-columns: 1fr;
    }

    .footer__grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: white;
        flex-direction: column;
        padding: 100px 40px 40px;
        gap: 28px;
        box-shadow: -10px 0 30px rgba(0,0,0,0.1);
        transition: var(--transition-slow);
    }

    .nav__menu.active {
        right: 0;
    }

    .nav__toggle {
        display: flex;
    }

    .section {
        padding: 64px 0;
    }

    .download__title {
        font-size: 1.8rem;
    }

    .screenshots__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 1.6rem;
    }

    .hero__actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .hero__stats {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .shop__grid {
        grid-template-columns: 1fr 1fr;
    }

    .download__buttons {
        flex-direction: column;
        align-items: center;
    }

    .download-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

/* ==================== Toast 提示 ==================== */
.toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    display: flex;
    align-items: center;
    gap: 14px;
    background: #1A1A2E;
    color: white;
    padding: 16px 28px;
    border-radius: 50px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.3);
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.toast--show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast__icon {
    font-size: 1.5rem;
}

.toast__text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.toast__text strong {
    font-size: 0.95rem;
    font-weight: 600;
}

.toast__text span {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.6);
}