* {margin: 0;padding: 0;box-sizing: border-box;font-family: "Microsoft Yahei", "PingFang SC", "Helvetica Neue", sans-serif;}
::-webkit-scrollbar {width: 7px;height: 7px;}
::-webkit-scrollbar-track {background: #1e2a33;}
::-webkit-scrollbar-thumb {background: #6b7280;border-radius: 10px;}
::-webkit-scrollbar-thumb:hover {background: #9ca3af;}
body {background: linear-gradient(135deg, #111827 0%, #1f2937 50%, #374151 100%);color: #fff;line-height: 1.7;overflow-x: hidden;}
.custom-toast {position: fixed;top: 100px;left: 50%;transform: translateX(-50%);padding: 14px 30px;background: #10b981;color: #fff;border-radius: 10px;font-size: 15px;font-weight: 500;z-index: 99999;box-shadow: 0 8px 25px rgba(0,0,0,0.25);opacity: 0;transition: all 0.3s ease;white-space: nowrap;}
.custom-toast.error {background: #ef4444;}
.custom-toast.show {opacity: 1;top: 120px;}
.navbar {display: flex;justify-content: space-between;align-items: center;padding: 20px 8%;position: fixed;top: 0;left: 0;right: 0;z-index: 999;background: rgba(17, 24, 39, 0.97);backdrop-filter: blur(12px);border-bottom: 1px solid rgba(255,255,255,0.08);box-shadow: 0 4px 20px rgba(0,0,0,0.1);}
.logo {font-size: 24px;font-weight: bold;color: #fff;display: flex;align-items: center;gap: 10px;}
.nav-links {display: flex;gap: 38px;align-items: center;}
.nav-links a {color: rgba(255,255,255,0.85);text-decoration: none;font-size: 16px;transition: all 0.3s;position: relative;}
.nav-links a:hover {color: #ffffff;transform: translateY(-1px);}
.nav-links a::after {content: '';position: absolute;bottom: -5px;left: 0;width: 0;height: 2px;background: #fff;transition: width 0.3s;}
.nav-links a:hover::after {width: 100%;}
.btn-login {background: #4f46e5;color: #fff;padding: 11px 26px;border-radius: 50px;font-weight: bold;font-size: 15px;transition: all 0.3s;border: none;cursor: pointer;box-shadow: 0 4px 15px rgba(79,70,229,0.2);}
.btn-login:hover {background: #6366f1;transform: translateY(-2px);box-shadow: 0 6px 20px rgba(79,70,229,0.3);}
.menu-toggle {display: none;font-size: 24px;cursor: pointer;}
.hero {min-height: 100vh;display: flex;align-items: center;justify-content: center;padding: 120px 8% 80px;position: relative;text-align: center;}
.hero::before {content: '';position: absolute;top: 0;left: 0;right: 0;bottom: 0;background: rgba(17, 24, 39, 0.75);z-index: 0;}
.hero-content {width: 100%;max-width: 900px;position: relative;z-index: 1;}
.badge {display: inline-block;background: rgba(255, 255, 255, 0.08);padding: 10px 22px;border-radius: 50px;font-size: 15px;margin-bottom: 28px;border: 1px solid rgba(255,255,255,0.1);}
.badge::before {content: '●';color: #10b981;margin-right: 8px;}
.hero-text h1 {font-size: 58px;font-weight: bold;margin-bottom: 16px;line-height: 1.2;text-shadow: 0 2px 10px rgba(0,0,0,0.3);}
.hero-text h2 {font-size: 32px;font-weight: normal;margin-bottom: 26px;opacity: 0.95;}
.hero-text p {font-size: 19px;margin-bottom: 45px;opacity: 0.9;line-height: 1.8;}
.hero-buttons {display: flex;gap: 22px;justify-content: center;margin-bottom: 65px;}
.btn-primary {background: #4f46e5;color: #fff;padding: 18px 44px;border-radius: 50px;font-size: 17px;font-weight: bold;border: none;cursor: pointer;transition: all 0.3s;display: flex;align-items: center;gap: 8px;box-shadow: 0 8px 25px rgba(79,70,229,0.3);}
.btn-primary:hover {transform: translateY(-4px);background: #6366f1;box-shadow: 0 12px 30px rgba(79,70,229,0.4);}
.btn-outline {background: transparent;color: #fff;border: 2px solid rgba(255,255,255,0.25);padding: 18px 44px;border-radius: 50px;font-size: 17px;font-weight: bold;cursor: pointer;transition: all 0.3s;display: flex;align-items: center;gap: 8px;}
.btn-outline:hover {background: rgba(255,255,255,0.08);border-color: #fff;transform: translateY(-4px);}
.stats-row {display: flex;justify-content: center;gap: 80px;padding-top: 40px;border-top: 1px solid rgba(255, 255, 255, 0.1);}
.stat-item {text-align: center;}
.stat-number {font-size: 38px;font-weight: bold;margin-bottom: 8px;background: linear-gradient(90deg, #fff, #d1d5db);-webkit-background-clip: text;-webkit-text-fill-color: transparent;}
.stat-label {font-size: 15px;opacity: 0.85;}
.section {padding: 110px 8%;text-align: center;}
.section-title {font-size: 38px;margin-bottom: 20px;position: relative;display: inline-block;}
.section-title::after {content: '';width: 60px;height: 4px;background: #4f46e5;border-radius: 2px;position: absolute;bottom: -12px;left: 50%;transform: translateX(-50%);}
.section-desc {font-size: 18px;opacity: 0.85;max-width: 720px;margin: 25px auto 65px;line-height: 1.8;}
.feature-grid {display: grid;grid-template-columns: repeat(3, 1fr);gap: 32px;}
.feature-card {background: rgba(255,255,255,0.05);padding: 45px 30px;border-radius: 20px;border: 1px solid rgba(255,255,255,0.08);transition: all 0.3s;box-shadow: 0 4px 15px rgba(0,0,0,0.1);}
.feature-card:hover {transform: translateY(-8px);background: rgba(255,255,255,0.07);box-shadow: 0 12px 30px rgba(0,0,0,0.15);border-color: rgba(255,255,255,0.15);}
.feature-card h3 {font-size: 23px;margin-bottom: 18px;color: #a5b4fc;}
.feature-card p {opacity: 0.85;line-height: 1.75;}
.price-bg {background: rgba(0,0,0,0.25);}
.price-grid {display: grid;grid-template-columns: repeat(3, 1fr);gap: 32px;max-width: 1100px;margin: 0 auto;}
.price-card {background: rgba(255,255,255,0.05);padding: 50px 35px;border-radius: 20px;border: 1px solid rgba(255,255,255,0.08);transition: all 0.3s;box-shadow: 0 8px 25px rgba(0,0,0,0.15);}
.price-card:hover {transform: translateY(-10px);background: rgba(255,255,255,0.08);border-color: #4f46e5;box-shadow: 0 15px 35px rgba(0,0,0,0.2);}
.price-card h3 {font-size: 26px;margin-bottom: 15px;color: #fff;}
.price {font-size: 42px;color: #a5b4fc;margin: 25px 0;font-weight: bold;}
.price-card p {margin: 10px 0;opacity: 0.85;}
.modal {display: none;position: fixed;top: 0;left: 0;right: 0;bottom: 0;background: rgba(0, 0, 0, 0.85);z-index: 9999;align-items: center;justify-content: center;}
.modal.active {display: flex;}
.modal-content {background: #fff;color: #333;border-radius: 16px;width: 90%;max-width: 420px;padding: 35px;position: relative;box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);border: 1px solid rgba(255,255,255,0.1);}
.modal-close {position: absolute;top: 18px;right: 18px;font-size: 24px;cursor: pointer;color: #999;transition: color 0.3s;}
.modal-close:hover {color: #111;}
.modal-tabs {display: flex;margin-bottom: 28px;border-bottom: 1px solid #eee;}
.modal-tab {flex: 1;text-align: center;padding: 14px 0;font-size: 16px;font-weight: bold;cursor: pointer;color: #888;border-bottom: 2px solid transparent;transition: all 0.3s;}
.modal-tab.active {color: #4f46e5;border-bottom-color: #4f46e5;}
.form-group {margin-bottom: 22px;}
.form-group label {display: block;margin-bottom: 8px;font-size: 14px;color: #555;}
.form-group input {width: 100%;padding: 14px 16px;border: 1px solid #e5e7eb;border-radius: 8px;font-size: 15px;transition: border-color 0.3s, box-shadow 0.3s;}
.form-group input:focus {outline: none;border-color: #4f46e5;box-shadow: 0 0 0 3px rgba(79,70,229,0.1);}
.form-submit {width: 100%;padding: 15px;background: #4f46e5;color: #fff;border: none;border-radius: 8px;font-size: 16px;font-weight: bold;cursor: pointer;transition: background 0.3s;}
.form-submit:hover {background: #6366f1;}
.form-tip {text-align: center;margin-top: 18px;font-size: 13px;color: #888;}
.form-tip a {color: #4f46e5;text-decoration: none;}
.login-error {color: #ef4444;text-align: center;margin: 10px 0;font-size: 14px;display: none;}
@media (max-width: 992px) {.nav-links { display: none; }.menu-toggle { display: block; }.hero-text h1 { font-size: 42px; }.feature-grid, .price-grid { grid-template-columns: repeat(2, 1fr); }.stats-row { gap: 45px; }}
@media (max-width: 576px) {.hero-text h1 { font-size: 34px; }.hero-buttons { flex-direction: column; align-items: center; }.stats-row { flex-direction: column; gap: 25px; }.feature-grid, .price-grid { grid-template-columns: 1fr; }.section { padding: 80px 5%; }}
@media (max-width: 992px) {
.nav-links {display: none;position: absolute;top: 100%;left: 0;right: 0;background: rgba(17, 24, 39, 0.98);backdrop-filter: blur(12px);flex-direction: column;padding: 20px;gap: 16px;border-bottom: 1px solid rgba(255,255,255,0.1);}
.nav-links.show {display: flex !important;}
.menu-toggle {display: block;}
.hero {padding-top: 140px;padding-bottom: 60px;}
.hero-text h1 {font-size: 32px;}
.hero-text h2 {font-size: 22px;}
.section {padding: 60px 20px;}
}
@media (max-width: 576px) {.hero-buttons {flex-direction: column;gap: 12px;}
.btn-primary, .btn-outline {width: 100%;justify-content: center;}
.stats-row {flex-direction: column;gap: 20px;}
.feature-grid, .price-grid {grid-template-columns: 1fr;}
.modal-content {margin: 20px;width: calc(100% - 40px);}
}