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index.css","css",[1544,1831,1832,1841,1849,1861,1871,1883,1893,1903,1913,1927,1931,1935,1947,1959,1972,1977,1982,1991,2004,2009,2022,2035],{"__ignoreMap":1557},[1561,1833,1834,1836,1838],{"class":1563,"line":1564},[1561,1835,1568],{"class":1567},[1561,1837,1572],{"class":1571},[1561,1839,1840],{"class":1567},",\n",[1561,1842,1843,1845,1847],{"class":1563,"line":1578},[1561,1844,1568],{"class":1567},[1561,1846,1757],{"class":1571},[1561,1848,1575],{"class":1567},[1561,1850,1851,1853,1855,1857,1859],{"class":1563,"line":1598},[1561,1852,1582],{"class":1581},[1561,1854,1585],{"class":1567},[1561,1856,1589],{"class":1588},[1561,1858,1592],{"class":1588},[1561,1860,1595],{"class":1567},[1561,1862,1863,1865,1867,1869],{"class":1563,"line":1611},[1561,1864,1601],{"class":1581},[1561,1866,1585],{"class":1567},[1561,1868,1606],{"class":1588},[1561,1870,1595],{"class":1567},[1561,1872,1873,1875,1877,1879,1881],{"class":1563,"line":1628},[1561,1874,1614],{"class":1581},[1561,1876,1585],{"class":1567},[1561,1878,1619],{"class":1567},[1561,1880,1623],{"class":1622},[1561,1882,1595],{"class":1567},[1561,1884,1885,1887,1889,1891],{"class":1563,"line":1641},[1561,1886,1631],{"class":1581},[1561,1888,1585],{"class":1567},[1561,1890,1636],{"class":1622},[1561,1892,1595],{"class":1567},[1561,1894,1895,1897,1899,1901],{"class":1563,"line":1654},[1561,1896,1644],{"class":1581},[1561,1898,1585],{"class":1567},[1561,1900,1649],{"class":1622},[1561,1902,1595],{"class":1567},[1561,1904,1905,1907,1909,1911],{"class":1563,"line":1667},[1561,1906,1657],{"class":1581},[1561,1908,1585],{"class":1567},[1561,1910,1662],{"class":1622},[1561,1912,1595],{"class":1567},[1561,1914,1915,1917,1919,1922,1925],{"class":1563,"line":1683},[1561,1916,1670],{"class":1581},[1561,1918,1585],{"class":1567},[1561,1920,1921],{"class":1622}," background-color ",[1561,1923,1924],{"class":1588},"0.3s",[1561,1926,1595],{"class":1567},[1561,1928,1929],{"class":1563,"line":1689},[1561,1930,1686],{"class":1567},[1561,1932,1933],{"class":1563,"line":1696},[1561,1934,1693],{"emptyLinePlaceholder":1692},[1561,1936,1937,1939,1941,1943,1945],{"class":1563,"line":1711},[1561,1938,1568],{"class":1567},[1561,1940,1572],{"class":1571},[1561,1942,1585],{"class":1567},[1561,1944,1706],{"class":1705},[1561,1946,1840],{"class":1567},[1561,1948,1949,1951,1953,1955,1957],{"class":1563,"line":1725},[1561,1950,1568],{"class":1567},[1561,1952,1757],{"class":1571},[1561,1954,1585],{"class":1567},[1561,1956,1706],{"class":1705},[1561,1958,1575],{"class":1567},[1561,1960,1962,1964,1966,1968,1970],{"class":1563,"line":1961},14,[1561,1963,1614],{"class":1581},[1561,1965,1585],{"class":1567},[1561,1967,1619],{"class":1567},[1561,1969,1720],{"class":1622},[1561,1971,1595],{"class":1567},[1561,1973,1975],{"class":1563,"line":1974},15,[1561,1976,1686],{"class":1567},[1561,1978,1980],{"class":1563,"line":1979},16,[1561,1981,1693],{"emptyLinePlaceholder":1692},[1561,1983,1985,1987,1989],{"class":1563,"line":1984},17,[1561,1986,1568],{"class":1567},[1561,1988,1757],{"class":1571},[1561,1990,1575],{"class":1567},[1561,1992,1994,1996,1998,2000,2002],{"class":1563,"line":1993},18,[1561,1995,1614],{"class":1581},[1561,1997,1585],{"class":1567},[1561,1999,1619],{"class":1567},[1561,2001,1783],{"class":1622},[1561,2003,1595],{"class":1567},[1561,2005,2007],{"class":1563,"line":2006},19,[1561,2008,1686],{"class":1567},[1561,2010,2012,2014,2016,2018,2020],{"class":1563,"line":2011},20,[1561,2013,1568],{"class":1567},[1561,2015,1757],{"class":1571},[1561,2017,1585],{"class":1567},[1561,2019,1706],{"class":1705},[1561,2021,1575],{"class":1567},[1561,2023,2025,2027,2029,2031,2033],{"class":1563,"line":2024},21,[1561,2026,1614],{"class":1581},[1561,2028,1585],{"class":1567},[1561,2030,1619],{"class":1567},[1561,2032,1812],{"class":1622},[1561,2034,1595],{"class":1567},[1561,2036,2038],{"class":1563,"line":2037},22,[1561,2039,1686],{"class":1567},[1530,2041,2042,2043,2045,2046,2048],{},"这样，",[1544,2044,1733],{}," 会继承 ",[1544,2047,1737],{}," 的所有样式，避免样式重复写。",[2050,2051,2052],"tip",{},[1530,2053,2054,2056],{},[1544,2055,1546],{}," 会让被继承的选择器和继承者合并生成新的选择器组，样式复用的同时避免冗余代码。但要避免继承过多复杂的选择器，防止生成过于复杂的 CSS 规则。",[2058,2059,2061],"h3",{"id":2060},"什么时候用-extend","什么时候用 @extend？",[2063,2064,2065,2069,2072],"ul",{},[2066,2067,2068],"li",{},"多个类共享一套基础样式，只需在子类中继承即可",[2066,2070,2071],{},"对象复用，如按钮、卡片、表单元素等样式基本统一",[2066,2073,2074],{},"避免把通用样式写多次，维护更方便",[2058,2076,2077],{"id":2077},"小例子",[1743,2079,2080,2211],{},[1552,2081,2083],{"className":1554,"code":2082,"filename":1748,"language":1556,"meta":1557,"style":1557},".message {\n    padding: 10px;\n    border-radius: 3px;\n    color: #fff;\n}\n\n.message-success {\n    @extend .message;\n    background-color: #2ecc71;\n}\n\n.message-error {\n    @extend .message;\n    background-color: #e74c3c;\n}\n",[1544,2084,2085,2094,2104,2115,2128,2132,2136,2145,2155,2168,2172,2176,2185,2195,2207],{"__ignoreMap":1557},[1561,2086,2087,2089,2092],{"class":1563,"line":1564},[1561,2088,1568],{"class":1567},[1561,2090,2091],{"class":1571},"message",[1561,2093,1575],{"class":1567},[1561,2095,2096,2098,2100,2102],{"class":1563,"line":1578},[1561,2097,1582],{"class":1581},[1561,2099,1585],{"class":1567},[1561,2101,1589],{"class":1588},[1561,2103,1595],{"class":1567},[1561,2105,2106,2108,2110,2113],{"class":1563,"line":1598},[1561,2107,1601],{"class":1581},[1561,2109,1585],{"class":1567},[1561,2111,2112],{"class":1588}," 3px",[1561,2114,1595],{"class":1567},[1561,2116,2117,2119,2121,2123,2126],{"class":1563,"line":1611},[1561,2118,1631],{"class":1581},[1561,2120,1585],{"class":1567},[1561,2122,1619],{"class":1567},[1561,2124,2125],{"class":1622},"fff",[1561,2127,1595],{"class":1567},[1561,2129,2130],{"class":1563,"line":1628},[1561,2131,1686],{"class":1567},[1561,2133,2134],{"class":1563,"line":1641},[1561,2135,1693],{"emptyLinePlaceholder":1692},[1561,2137,2138,2140,2143],{"class":1563,"line":1654},[1561,2139,1568],{"class":1567},[1561,2141,2142],{"class":1571},"message-success",[1561,2144,1575],{"class":1567},[1561,2146,2147,2149,2151,2153],{"class":1563,"line":1667},[1561,2148,1765],{"class":1764},[1561,2150,1768],{"class":1567},[1561,2152,2091],{"class":1571},[1561,2154,1595],{"class":1567},[1561,2156,2157,2159,2161,2163,2166],{"class":1563,"line":1683},[1561,2158,1614],{"class":1581},[1561,2160,1585],{"class":1567},[1561,2162,1619],{"class":1567},[1561,2164,2165],{"class":1622},"2ecc71",[1561,2167,1595],{"class":1567},[1561,2169,2170],{"class":1563,"line":1689},[1561,2171,1686],{"class":1567},[1561,2173,2174],{"class":1563,"line":1696},[1561,2175,1693],{"emptyLinePlaceholder":1692},[1561,2177,2178,2180,2183],{"class":1563,"line":1711},[1561,2179,1568],{"class":1567},[1561,2181,2182],{"class":1571},"message-error",[1561,2184,1575],{"class":1567},[1561,2186,2187,2189,2191,2193],{"class":1563,"line":1725},[1561,2188,1765],{"class":1764},[1561,2190,1768],{"class":1567},[1561,2192,2091],{"class":1571},[1561,2194,1595],{"class":1567},[1561,2196,2197,2199,2201,2203,2205],{"class":1563,"line":1961},[1561,2198,1614],{"class":1581},[1561,2200,1585],{"class":1567},[1561,2202,1619],{"class":1567},[1561,2204,1783],{"class":1622},[1561,2206,1595],{"class":1567},[1561,2208,2209],{"class":1563,"line":1974},[1561,2210,1686],{"class":1567},[1552,2212,2214],{"className":1826,"code":2213,"filename":1828,"language":1829,"meta":1557,"style":1557},".message,\n.message-error,\n.message-success {\n    padding: 10px;\n    border-radius: 3px;\n    color: #fff;\n}\n\n.message-success {\n    background-color: #2ecc71;\n}\n\n.message-error {\n    background-color: #e74c3c;\n}\n",[1544,2215,2216,2224,2232,2240,2250,2260,2272,2276,2280,2288,2300,2304,2308,2316,2328],{"__ignoreMap":1557},[1561,2217,2218,2220,2222],{"class":1563,"line":1564},[1561,2219,1568],{"class":1567},[1561,2221,2091],{"class":1571},[1561,2223,1840],{"class":1567},[1561,2225,2226,2228,2230],{"class":1563,"line":1578},[1561,2227,1568],{"class":1567},[1561,2229,2182],{"class":1571},[1561,2231,1840],{"class":1567},[1561,2233,2234,2236,2238],{"class":1563,"line":1598},[1561,2235,1568],{"class":1567},[1561,2237,2142],{"class":1571},[1561,2239,1575],{"class":1567},[1561,2241,2242,2244,2246,2248],{"class":1563,"line":1611},[1561,2243,1582],{"class":1581},[1561,2245,1585],{"class":1567},[1561,2247,1589],{"class":1588},[1561,2249,1595],{"class":1567},[1561,2251,2252,2254,2256,2258],{"class":1563,"line":1628},[1561,2253,1601],{"class":1581},[1561,2255,1585],{"class":1567},[1561,2257,2112],{"class":1588},[1561,2259,1595],{"class":1567},[1561,2261,2262,2264,2266,2268,2270],{"class":1563,"line":1641},[1561,2263,1631],{"class":1581},[1561,2265,1585],{"class":1567},[1561,2267,1619],{"class":1567},[1561,2269,2125],{"class":1622},[1561,2271,1595],{"class":1567},[1561,2273,2274],{"class":1563,"line":1654},[1561,2275,1686],{"class":1567},[1561,2277,2278],{"class":1563,"line":1667},[1561,2279,1693],{"emptyLinePlaceholder":1692},[1561,2281,2282,2284,2286],{"class":1563,"line":1683},[1561,2283,1568],{"class":1567},[1561,2285,2142],{"class":1571},[1561,2287,1575],{"class":1567},[1561,2289,2290,2292,2294,2296,2298],{"class":1563,"line":1689},[1561,2291,1614],{"class":1581},[1561,2293,1585],{"class":1567},[1561,2295,1619],{"class":1567},[1561,2297,2165],{"class":1622},[1561,2299,1595],{"class":1567},[1561,2301,2302],{"class":1563,"line":1696},[1561,2303,1686],{"class":1567},[1561,2305,2306],{"class":1563,"line":1711},[1561,2307,1693],{"emptyLinePlaceholder":1692},[1561,2309,2310,2312,2314],{"class":1563,"line":1725},[1561,2311,1568],{"class":1567},[1561,2313,2182],{"class":1571},[1561,2315,1575],{"class":1567},[1561,2317,2318,2320,2322,2324,2326],{"class":1563,"line":1961},[1561,2319,1614],{"class":1581},[1561,2321,1585],{"class":1567},[1561,2323,1619],{"class":1567},[1561,2325,1783],{"class":1622},[1561,2327,1595],{"class":1567},[1561,2329,2330],{"class":1563,"line":1974},[1561,2331,1686],{"class":1567},[1530,2333,2334],{},"这段代码清晰地展示了如何用继承实现多种消息框样式，写起来简洁易懂。",[1534,2336],{},[1525,2338,2340],{"id":2339},"placeholder-的应用","🌟 %placeholder 的应用",[1530,2342,2343,2346,2347,2354],{},[1544,2344,2345],{},"%placeholder"," 是 Scss 中定义占位符选择器的一种写法，它和普通类选择器不同，",[2348,2349,2350,2351,2353],"strong",{},"不会被编译成 CSS 的选择器，只能被 ",[1544,2352,1546],{}," 使用","。这让它成为代码复用的另一大利器。",[1530,2356,2357],{},"比如：",[1743,2359,2360,2537],{},[1552,2361,2363],{"className":1554,"code":2362,"filename":1748,"language":1556,"meta":1557,"style":1557},"%btn-base {\n    padding: 10px 15px;\n    border-radius: 5px;\n    display: inline-block;\n    text-align: center;\n    cursor: pointer;\n}\n\n.btn-primary {\n    @extend %btn-base;\n    background-color: #3498db;\n    color: white;\n}\n\n.btn-secondary {\n    @extend %btn-base;\n    background-color: #95a5a6;\n    color: white;\n}\n",[1544,2364,2365,2375,2388,2399,2411,2423,2433,2437,2441,2450,2461,2473,2483,2487,2491,2500,2510,2523,2533],{"__ignoreMap":1557},[1561,2366,2367,2370,2373],{"class":1563,"line":1564},[1561,2368,2369],{"class":1567},"%",[1561,2371,2372],{"class":1705},"btn-base",[1561,2374,1575],{"class":1567},[1561,2376,2377,2379,2381,2383,2386],{"class":1563,"line":1578},[1561,2378,1582],{"class":1581},[1561,2380,1585],{"class":1567},[1561,2382,1589],{"class":1588},[1561,2384,2385],{"class":1588}," 15px",[1561,2387,1595],{"class":1567},[1561,2389,2390,2392,2394,2397],{"class":1563,"line":1598},[1561,2391,1601],{"class":1581},[1561,2393,1585],{"class":1567},[1561,2395,2396],{"class":1588}," 5px",[1561,2398,1595],{"class":1567},[1561,2400,2401,2404,2406,2409],{"class":1563,"line":1611},[1561,2402,2403],{"class":1581},"    display",[1561,2405,1585],{"class":1567},[1561,2407,2408],{"class":1622}," inline-block",[1561,2410,1595],{"class":1567},[1561,2412,2413,2416,2418,2421],{"class":1563,"line":1628},[1561,2414,2415],{"class":1581},"    text-align",[1561,2417,1585],{"class":1567},[1561,2419,2420],{"class":1622}," center",[1561,2422,1595],{"class":1567},[1561,2424,2425,2427,2429,2431],{"class":1563,"line":1641},[1561,2426,1657],{"class":1571},[1561,2428,1585],{"class":1567},[1561,2430,1662],{"class":1622},[1561,2432,1595],{"class":1567},[1561,2434,2435],{"class":1563,"line":1654},[1561,2436,1686],{"class":1567},[1561,2438,2439],{"class":1563,"line":1667},[1561,2440,1693],{"emptyLinePlaceholder":1692},[1561,2442,2443,2445,2448],{"class":1563,"line":1683},[1561,2444,1568],{"class":1567},[1561,2446,2447],{"class":1571},"btn-primary",[1561,2449,1575],{"class":1567},[1561,2451,2452,2454,2457,2459],{"class":1563,"line":1689},[1561,2453,1765],{"class":1764},[1561,2455,2456],{"class":1567}," %",[1561,2458,2372],{"class":1705},[1561,2460,1595],{"class":1567},[1561,2462,2463,2465,2467,2469,2471],{"class":1563,"line":1696},[1561,2464,1614],{"class":1581},[1561,2466,1585],{"class":1567},[1561,2468,1619],{"class":1567},[1561,2470,1623],{"class":1622},[1561,2472,1595],{"class":1567},[1561,2474,2475,2477,2479,2481],{"class":1563,"line":1711},[1561,2476,1631],{"class":1581},[1561,2478,1585],{"class":1567},[1561,2480,1636],{"class":1622},[1561,2482,1595],{"class":1567},[1561,2484,2485],{"class":1563,"line":1725},[1561,2486,1686],{"class":1567},[1561,2488,2489],{"class":1563,"line":1961},[1561,2490,1693],{"emptyLinePlaceholder":1692},[1561,2492,2493,2495,2498],{"class":1563,"line":1974},[1561,2494,1568],{"class":1567},[1561,2496,2497],{"class":1571},"btn-secondary",[1561,2499,1575],{"class":1567},[1561,2501,2502,2504,2506,2508],{"class":1563,"line":1979},[1561,2503,1765],{"class":1764},[1561,2505,2456],{"class":1567},[1561,2507,2372],{"class":1705},[1561,2509,1595],{"class":1567},[1561,2511,2512,2514,2516,2518,2521],{"class":1563,"line":1984},[1561,2513,1614],{"class":1581},[1561,2515,1585],{"class":1567},[1561,2517,1619],{"class":1567},[1561,2519,2520],{"class":1622},"95a5a6",[1561,2522,1595],{"class":1567},[1561,2524,2525,2527,2529,2531],{"class":1563,"line":1993},[1561,2526,1631],{"class":1581},[1561,2528,1585],{"class":1567},[1561,2530,1636],{"class":1622},[1561,2532,1595],{"class":1567},[1561,2534,2535],{"class":1563,"line":2006},[1561,2536,1686],{"class":1567},[1552,2538,2540],{"className":1826,"code":2539,"filename":1828,"language":1829,"meta":1557,"style":1557},".btn-secondary,\n.btn-primary {\n    padding: 10px 15px;\n    border-radius: 5px;\n    display: inline-block;\n    text-align: center;\n    cursor: pointer;\n}\n\n.btn-primary {\n    background-color: #3498db;\n    color: white;\n}\n\n.btn-secondary {\n    background-color: #95a5a6;\n    color: white;\n}\n",[1544,2541,2542,2550,2558,2570,2580,2590,2600,2610,2614,2618,2626,2638,2648,2652,2656,2664,2676,2686],{"__ignoreMap":1557},[1561,2543,2544,2546,2548],{"class":1563,"line":1564},[1561,2545,1568],{"class":1567},[1561,2547,2497],{"class":1571},[1561,2549,1840],{"class":1567},[1561,2551,2552,2554,2556],{"class":1563,"line":1578},[1561,2553,1568],{"class":1567},[1561,2555,2447],{"class":1571},[1561,2557,1575],{"class":1567},[1561,2559,2560,2562,2564,2566,2568],{"class":1563,"line":1598},[1561,2561,1582],{"class":1581},[1561,2563,1585],{"class":1567},[1561,2565,1589],{"class":1588},[1561,2567,2385],{"class":1588},[1561,2569,1595],{"class":1567},[1561,2571,2572,2574,2576,2578],{"class":1563,"line":1611},[1561,2573,1601],{"class":1581},[1561,2575,1585],{"class":1567},[1561,2577,2396],{"class":1588},[1561,2579,1595],{"class":1567},[1561,2581,2582,2584,2586,2588],{"class":1563,"line":1628},[1561,2583,2403],{"class":1581},[1561,2585,1585],{"class":1567},[1561,2587,2408],{"class":1622},[1561,2589,1595],{"class":1567},[1561,2591,2592,2594,2596,2598],{"class":1563,"line":1641},[1561,2593,2415],{"class":1581},[1561,2595,1585],{"class":1567},[1561,2597,2420],{"class":1622},[1561,2599,1595],{"class":1567},[1561,2601,2602,2604,2606,2608],{"class":1563,"line":1654},[1561,2603,1657],{"class":1581},[1561,2605,1585],{"class":1567},[1561,2607,1662],{"class":1622},[1561,2609,1595],{"class":1567},[1561,2611,2612],{"class":1563,"line":1667},[1561,2613,1686],{"class":1567},[1561,2615,2616],{"class":1563,"line":1683},[1561,2617,1693],{"emptyLinePlaceholder":1692},[1561,2619,2620,2622,2624],{"class":1563,"line":1689},[1561,2621,1568],{"class":1567},[1561,2623,2447],{"class":1571},[1561,2625,1575],{"class":1567},[1561,2627,2628,2630,2632,2634,2636],{"class":1563,"line":1696},[1561,2629,1614],{"class":1581},[1561,2631,1585],{"class":1567},[1561,2633,1619],{"class":1567},[1561,2635,1623],{"class":1622},[1561,2637,1595],{"class":1567},[1561,2639,2640,2642,2644,2646],{"class":1563,"line":1711},[1561,2641,1631],{"class":1581},[1561,2643,1585],{"class":1567},[1561,2645,1636],{"class":1622},[1561,2647,1595],{"class":1567},[1561,2649,2650],{"class":1563,"line":1725},[1561,2651,1686],{"class":1567},[1561,2653,2654],{"class":1563,"line":1961},[1561,2655,1693],{"emptyLinePlaceholder":1692},[1561,2657,2658,2660,2662],{"class":1563,"line":1974},[1561,2659,1568],{"class":1567},[1561,2661,2497],{"class":1571},[1561,2663,1575],{"class":1567},[1561,2665,2666,2668,2670,2672,2674],{"class":1563,"line":1979},[1561,2667,1614],{"class":1581},[1561,2669,1585],{"class":1567},[1561,2671,1619],{"class":1567},[1561,2673,2520],{"class":1622},[1561,2675,1595],{"class":1567},[1561,2677,2678,2680,2682,2684],{"class":1563,"line":1984},[1561,2679,1631],{"class":1581},[1561,2681,1585],{"class":1567},[1561,2683,1636],{"class":1622},[1561,2685,1595],{"class":1567},[1561,2687,2688],{"class":1563,"line":1993},[1561,2689,1686],{"class":1567},[1530,2691,2692,2693,2696,2697,2700,2701,2704],{},"生成的 CSS 里只会出现 ",[1544,2694,2695],{},".btn-primary"," 和 ",[1544,2698,2699],{},".btn-secondary","，但它们共享 ",[1544,2702,2703],{},"%btn-base"," 的样式。",[2058,2706,2708],{"id":2707},"为什么用-placeholder-而不是普通类","为什么用 %placeholder 而不是普通类？",[2063,2710,2711,2714,2717],{},[2066,2712,2713],{},"避免生成不必要的 CSS 代码",[2066,2715,2716],{},"明确只有被继承时才产生样式",[2066,2718,2719],{},"方便写抽象的基类样式",[2050,2721,2722],{},[1530,2723,2724,2725,2727],{},"用 ",[1544,2726,2345],{}," 定义基础样式，确保不生成无用的类选择器，减少样式体积。它比直接写通用类更“干净”，代码更加模块化。",[1534,2729],{},[1525,2731,2733],{"id":2732},"bem-scss-是如何结合的","🌟 BEM + SCSS 是如何结合的",[1530,2735,2736],{},"BEM（Block Element Modifier）是一套命名规范，能帮助我们写出结构清晰、可维护的 CSS。",[1530,2738,2739],{},"BEM 的命名格式通常是：",[1552,2741,2746],{"className":2742,"code":2744,"language":2745},[2743],"language-text",".block {}\n.block__element {}\n.block--modifier {}\n","text",[1544,2747,2744],{"__ignoreMap":1557},[1530,2749,2750],{},"结合 Scss，可以用嵌套语法来写 BEM，更直观。",[1530,2752,2753],{},"举例：",[1743,2755,2756,2926],{},[1552,2757,2759],{"className":1554,"code":2758,"filename":1748,"language":1556,"meta":1557,"style":1557},".card {\n    background: #f4f4f4;\n    border-radius: 6px;\n    padding: 20px;\n\n    &__title {\n        font-size: 20px;\n        font-weight: bold;\n    }\n\n    &__content {\n        margin-top: 10px;\n        font-size: 14px;\n    }\n\n    &--highlighted {\n        border: 2px solid #3498db;\n    }\n}\n",[1544,2760,2761,2770,2784,2795,2805,2809,2818,2829,2841,2845,2849,2858,2869,2880,2884,2888,2898,2918,2922],{"__ignoreMap":1557},[1561,2762,2763,2765,2768],{"class":1563,"line":1564},[1561,2764,1568],{"class":1567},[1561,2766,2767],{"class":1571},"card",[1561,2769,1575],{"class":1567},[1561,2771,2772,2775,2777,2779,2782],{"class":1563,"line":1578},[1561,2773,2774],{"class":1581},"    background",[1561,2776,1585],{"class":1567},[1561,2778,1619],{"class":1567},[1561,2780,2781],{"class":1622},"f4f4f4",[1561,2783,1595],{"class":1567},[1561,2785,2786,2788,2790,2793],{"class":1563,"line":1598},[1561,2787,1601],{"class":1581},[1561,2789,1585],{"class":1567},[1561,2791,2792],{"class":1588}," 6px",[1561,2794,1595],{"class":1567},[1561,2796,2797,2799,2801,2803],{"class":1563,"line":1611},[1561,2798,1582],{"class":1581},[1561,2800,1585],{"class":1567},[1561,2802,1592],{"class":1588},[1561,2804,1595],{"class":1567},[1561,2806,2807],{"class":1563,"line":1628},[1561,2808,1693],{"emptyLinePlaceholder":1692},[1561,2810,2811,2813,2816],{"class":1563,"line":1641},[1561,2812,1794],{"class":1571},[1561,2814,2815],{"class":1567},"__title",[1561,2817,1575],{"class":1567},[1561,2819,2820,2823,2825,2827],{"class":1563,"line":1654},[1561,2821,2822],{"class":1581},"        font-size",[1561,2824,1585],{"class":1567},[1561,2826,1592],{"class":1588},[1561,2828,1595],{"class":1567},[1561,2830,2831,2834,2836,2839],{"class":1563,"line":1667},[1561,2832,2833],{"class":1581},"        font-weight",[1561,2835,1585],{"class":1567},[1561,2837,2838],{"class":1622}," bold",[1561,2840,1595],{"class":1567},[1561,2842,2843],{"class":1563,"line":1683},[1561,2844,1819],{"class":1567},[1561,2846,2847],{"class":1563,"line":1689},[1561,2848,1693],{"emptyLinePlaceholder":1692},[1561,2850,2851,2853,2856],{"class":1563,"line":1696},[1561,2852,1794],{"class":1571},[1561,2854,2855],{"class":1567},"__content",[1561,2857,1575],{"class":1567},[1561,2859,2860,2863,2865,2867],{"class":1563,"line":1711},[1561,2861,2862],{"class":1581},"        margin-top",[1561,2864,1585],{"class":1567},[1561,2866,1589],{"class":1588},[1561,2868,1595],{"class":1567},[1561,2870,2871,2873,2875,2878],{"class":1563,"line":1725},[1561,2872,2822],{"class":1581},[1561,2874,1585],{"class":1567},[1561,2876,2877],{"class":1588}," 14px",[1561,2879,1595],{"class":1567},[1561,2881,2882],{"class":1563,"line":1961},[1561,2883,1819],{"class":1567},[1561,2885,2886],{"class":1563,"line":1974},[1561,2887,1693],{"emptyLinePlaceholder":1692},[1561,2889,2890,2892,2895],{"class":1563,"line":1979},[1561,2891,1794],{"class":1571},[1561,2893,2894],{"class":1622},"--highlighted ",[1561,2896,2897],{"class":1567},"{\n",[1561,2899,2900,2903,2905,2908,2911,2914,2916],{"class":1563,"line":1984},[1561,2901,2902],{"class":1581},"        border",[1561,2904,1585],{"class":1567},[1561,2906,2907],{"class":1588}," 2px",[1561,2909,2910],{"class":1622}," solid ",[1561,2912,2913],{"class":1567},"#",[1561,2915,1623],{"class":1622},[1561,2917,1595],{"class":1567},[1561,2919,2920],{"class":1563,"line":1993},[1561,2921,1819],{"class":1567},[1561,2923,2924],{"class":1563,"line":2006},[1561,2925,1686],{"class":1567},[1552,2927,2929],{"className":1826,"code":2928,"filename":1828,"language":1829,"meta":1557,"style":1557},".card {\n    background: #f4f4f4;\n    border-radius: 6px;\n    padding: 20px;\n}\n.card__title {\n    font-size: 20px;\n    font-weight: bold;\n}\n.card__content {\n    margin-top: 10px;\n    font-size: 14px;\n}\n.card--highlighted {\n    border: 2px solid #3498db;\n}\n",[1544,2930,2931,2939,2951,2961,2971,2975,2984,2995,3006,3010,3019,3030,3040,3044,3053,3069],{"__ignoreMap":1557},[1561,2932,2933,2935,2937],{"class":1563,"line":1564},[1561,2934,1568],{"class":1567},[1561,2936,2767],{"class":1571},[1561,2938,1575],{"class":1567},[1561,2940,2941,2943,2945,2947,2949],{"class":1563,"line":1578},[1561,2942,2774],{"class":1581},[1561,2944,1585],{"class":1567},[1561,2946,1619],{"class":1567},[1561,2948,2781],{"class":1622},[1561,2950,1595],{"class":1567},[1561,2952,2953,2955,2957,2959],{"class":1563,"line":1598},[1561,2954,1601],{"class":1581},[1561,2956,1585],{"class":1567},[1561,2958,2792],{"class":1588},[1561,2960,1595],{"class":1567},[1561,2962,2963,2965,2967,2969],{"class":1563,"line":1611},[1561,2964,1582],{"class":1581},[1561,2966,1585],{"class":1567},[1561,2968,1592],{"class":1588},[1561,2970,1595],{"class":1567},[1561,2972,2973],{"class":1563,"line":1628},[1561,2974,1686],{"class":1567},[1561,2976,2977,2979,2982],{"class":1563,"line":1641},[1561,2978,1568],{"class":1567},[1561,2980,2981],{"class":1571},"card__title",[1561,2983,1575],{"class":1567},[1561,2985,2986,2989,2991,2993],{"class":1563,"line":1654},[1561,2987,2988],{"class":1581},"    font-size",[1561,2990,1585],{"class":1567},[1561,2992,1592],{"class":1588},[1561,2994,1595],{"class":1567},[1561,2996,2997,3000,3002,3004],{"class":1563,"line":1667},[1561,2998,2999],{"class":1581},"    font-weight",[1561,3001,1585],{"class":1567},[1561,3003,2838],{"class":1622},[1561,3005,1595],{"class":1567},[1561,3007,3008],{"class":1563,"line":1683},[1561,3009,1686],{"class":1567},[1561,3011,3012,3014,3017],{"class":1563,"line":1689},[1561,3013,1568],{"class":1567},[1561,3015,3016],{"class":1571},"card__content",[1561,3018,1575],{"class":1567},[1561,3020,3021,3024,3026,3028],{"class":1563,"line":1696},[1561,3022,3023],{"class":1581},"    margin-top",[1561,3025,1585],{"class":1567},[1561,3027,1589],{"class":1588},[1561,3029,1595],{"class":1567},[1561,3031,3032,3034,3036,3038],{"class":1563,"line":1711},[1561,3033,2988],{"class":1581},[1561,3035,1585],{"class":1567},[1561,3037,2877],{"class":1588},[1561,3039,1595],{"class":1567},[1561,3041,3042],{"class":1563,"line":1725},[1561,3043,1686],{"class":1567},[1561,3045,3046,3048,3051],{"class":1563,"line":1961},[1561,3047,1568],{"class":1567},[1561,3049,3050],{"class":1571},"card--highlighted",[1561,3052,1575],{"class":1567},[1561,3054,3055,3057,3059,3061,3063,3065,3067],{"class":1563,"line":1974},[1561,3056,1644],{"class":1581},[1561,3058,1585],{"class":1567},[1561,3060,2907],{"class":1588},[1561,3062,2910],{"class":1622},[1561,3064,2913],{"class":1567},[1561,3066,1623],{"class":1622},[1561,3068,1595],{"class":1567},[1561,3070,3071],{"class":1563,"line":1979},[1561,3072,1686],{"class":1567},[1530,3074,3075,3076,2696,3079,3082,3083,3086,3087,3082,3090,3092],{},"这里 ",[1544,3077,3078],{},".card__title",[1544,3080,3081],{},".card__content"," 是 ",[1544,3084,3085],{},".card"," 的元素，",[1544,3088,3089],{},".card--highlighted",[1544,3091,3085],{}," 的修饰符。",[2050,3094,3095],{},[1530,3096,3097,3098,3101],{},"结合 BEM，Scss 的嵌套语法帮我们减少重复写 ",[1544,3099,3100],{},".block","，让代码结构层次清晰，易于维护。",[2058,3103,3105],{"id":3104},"bem-scss-的代码组织小技巧","BEM + SCSS 的代码组织小技巧",[2063,3107,3108,3111,3118,3124],{},[2066,3109,3110],{},"块（Block）作为最外层选择器",[2066,3112,3113,3114,3117],{},"元素（Element）用 ",[1544,3115,3116],{},"&__xxx"," 嵌套写法",[2066,3119,3120,3121,3117],{},"修饰符（Modifier）用 ",[1544,3122,3123],{},"&--xxx",[2066,3125,3126],{},"组成模块时，把一个 Block 作为一个 SCSS 文件／模块",[1534,3128],{},[1525,3130,3132],{"id":3131},"小节总结","🧾 小节总结",[2063,3134,3135,3141,3149,3152],{},[2066,3136,3137,3138,3140],{},"使用 ",[1544,3139,1546],{}," 可以继承已有选择器样式，避免重复代码，写出干净样式。",[2066,3142,3143,3145,3146,3148],{},[1544,3144,2345],{}," 是定义不会单独生成代码的占位符，和 ",[1544,3147,1546],{}," 搭配写出高复用基础样式。",[2066,3150,3151],{},"BEM 规范结合 Scss 嵌套写法，结构清晰，代码易读维护。",[2066,3153,3154],{},"合理拆分 SCSS 文件模块，提升项目可维护性和扩展性。",[1534,3156],{},[1525,3158,3160],{"id":3159},"知识问答qa","❓ 知识问答（Q&A）",[1530,3162,3163,3164,2696,3166,3168],{},"Q：",[1544,3165,1546],{},[1544,3167,2345],{}," 有什么区别？",[1530,3170,3171,3172,3174,3175,3177],{},"A：",[1544,3173,1546],{}," 是继承机制，任何选择器都可以被继承。而 ",[1544,3176,2345],{}," 是定义一个不会单独生成选择器的占位符，只能被继承，避免无用代码。",[1530,3179,3180],{},"Q：BEM 结合 SCSS 嵌套有什么好处？",[1530,3182,3183],{},"A：减少了重复写长类名，提高代码层次感，结构更直观，方便维护和团队协作。",[1530,3185,3186],{},"Q：拆分 SCSS 文件的原则有哪些？",[1530,3188,3189],{},"A：基础样式和变量放 base，组件分模块，布局相关放 layout，页面样式单独文件，主入口导入所有模块。",[1534,3191],{},[1525,3193,3195],{"id":3194},"小练习","🧪 小练习",[2058,3197,3199,3200,2696,3202,3204],{"id":3198},"练习-1用-extend-和-placeholder-写一个按钮组样式","练习 1：用 ",[1544,3201,1546],{},[1544,3203,2345],{}," 写一个按钮组样式",[1530,3206,3207,3208,3210,3211,2696,3213,3216],{},"创建 ",[1544,3209,2703],{}," 占位符，写基础按钮样式。然后写 ",[1544,3212,2695],{},[1544,3214,3215],{},".btn-danger"," 继承它，并分别定义不同的背景色和悬停效果。",[1552,3218,3220],{"className":1554,"code":3219,"language":1556,"meta":1557,"style":1557},"%btn-base {\n    /* 基础按钮样式写这里 */\n}\n\n.btn-primary {\n    /* 继承 %btn-base，写主按钮颜色 */\n}\n\n.btn-danger {\n    /* 继承 %btn-base，写警告按钮颜色 */\n}\n",[1544,3221,3222,3230,3236,3240,3244,3252,3257,3261,3265,3274,3279],{"__ignoreMap":1557},[1561,3223,3224,3226,3228],{"class":1563,"line":1564},[1561,3225,2369],{"class":1567},[1561,3227,2372],{"class":1705},[1561,3229,1575],{"class":1567},[1561,3231,3232],{"class":1563,"line":1578},[1561,3233,3235],{"class":3234},"syuKq","    /* 基础按钮样式写这里 */\n",[1561,3237,3238],{"class":1563,"line":1598},[1561,3239,1686],{"class":1567},[1561,3241,3242],{"class":1563,"line":1611},[1561,3243,1693],{"emptyLinePlaceholder":1692},[1561,3245,3246,3248,3250],{"class":1563,"line":1628},[1561,3247,1568],{"class":1567},[1561,3249,2447],{"class":1571},[1561,3251,1575],{"class":1567},[1561,3253,3254],{"class":1563,"line":1641},[1561,3255,3256],{"class":3234},"    /* 继承 %btn-base，写主按钮颜色 */\n",[1561,3258,3259],{"class":1563,"line":1654},[1561,3260,1686],{"class":1567},[1561,3262,3263],{"class":1563,"line":1667},[1561,3264,1693],{"emptyLinePlaceholder":1692},[1561,3266,3267,3269,3272],{"class":1563,"line":1683},[1561,3268,1568],{"class":1567},[1561,3270,3271],{"class":1571},"btn-danger",[1561,3273,1575],{"class":1567},[1561,3275,3276],{"class":1563,"line":1689},[1561,3277,3278],{"class":3234},"    /* 继承 %btn-base，写警告按钮颜色 */\n",[1561,3280,3281],{"class":1563,"line":1696},[1561,3282,1686],{"class":1567},[2058,3284,3286],{"id":3285},"练习-2用-bem-和-scss-嵌套写一个卡片组件","练习 2：用 BEM 和 Scss 嵌套写一个卡片组件",[1530,3288,3289,3290,3292,3293,2696,3296,3299,3300,3303],{},"写一个 ",[1544,3291,3085],{}," 块，包含 ",[1544,3294,3295],{},".card__header",[1544,3297,3298],{},".card__body"," 元素，和一个修饰符 ",[1544,3301,3302],{},".card--featured"," 改变卡片边框颜色。",[1552,3305,3307],{"className":1554,"code":3306,"language":1556,"meta":1557,"style":1557},".card {\n    /* 卡片基础样式 */\n\n    &__header {\n        /* 标题样式 */\n    }\n\n    &__body {\n        /* 内容样式 */\n    }\n\n    &--featured {\n        /* 特色卡片修饰符 */\n    }\n}\n",[1544,3308,3309,3317,3322,3326,3335,3340,3344,3348,3357,3362,3366,3370,3379,3384,3388],{"__ignoreMap":1557},[1561,3310,3311,3313,3315],{"class":1563,"line":1564},[1561,3312,1568],{"class":1567},[1561,3314,2767],{"class":1571},[1561,3316,1575],{"class":1567},[1561,3318,3319],{"class":1563,"line":1578},[1561,3320,3321],{"class":3234},"    /* 卡片基础样式 */\n",[1561,3323,3324],{"class":1563,"line":1598},[1561,3325,1693],{"emptyLinePlaceholder":1692},[1561,3327,3328,3330,3333],{"class":1563,"line":1611},[1561,3329,1794],{"class":1571},[1561,3331,3332],{"class":1567},"__header",[1561,3334,1575],{"class":1567},[1561,3336,3337],{"class":1563,"line":1628},[1561,3338,3339],{"class":3234},"        /* 标题样式 */\n",[1561,3341,3342],{"class":1563,"line":1641},[1561,3343,1819],{"class":1567},[1561,3345,3346],{"class":1563,"line":1654},[1561,3347,1693],{"emptyLinePlaceholder":1692},[1561,3349,3350,3352,3355],{"class":1563,"line":1667},[1561,3351,1794],{"class":1571},[1561,3353,3354],{"class":1567},"__body",[1561,3356,1575],{"class":1567},[1561,3358,3359],{"class":1563,"line":1683},[1561,3360,3361],{"class":3234},"        /* 内容样式 */\n",[1561,3363,3364],{"class":1563,"line":1689},[1561,3365,1819],{"class":1567},[1561,3367,3368],{"class":1563,"line":1696},[1561,3369,1693],{"emptyLinePlaceholder":1692},[1561,3371,3372,3374,3377],{"class":1563,"line":1711},[1561,3373,1794],{"class":1571},[1561,3375,3376],{"class":1622},"--featured ",[1561,3378,2897],{"class":1567},[1561,3380,3381],{"class":1563,"line":1725},[1561,3382,3383],{"class":3234},"        /* 特色卡片修饰符 */\n",[1561,3385,3386],{"class":1563,"line":1961},[1561,3387,1819],{"class":1567},[1561,3389,3390],{"class":1563,"line":1974},[1561,3391,1686],{"class":1567},[1534,3393],{},[1530,3395,3396,3397,3399,3400,3402],{},"🎉 恭喜你已经掌握 Scss 的 ",[1544,3398,1546],{},"、",[1544,3401,2345],{},"、BEM 结合 Scss 以及模块化拆分的技能啦！用这些技巧写出的代码会更清晰、更易维护，快去实践吧！",[3404,3405,3406],"style",{},"html pre.shiki code .s86vT, html code.shiki .s86vT{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sYGMc, html code.shiki .sYGMc{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}html pre.shiki code .sug0G, html code.shiki .sug0G{--shiki-light:#8796B0;--shiki-default:#B2CCD6;--shiki-dark:#B2CCD6}html pre.shiki code .smPcV, html code.shiki .smPcV{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html pre.shiki code .sndM8, html code.shiki .sndM8{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .s50WR, html code.shiki .s50WR{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark 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.syuKq{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}",{"title":1557,"searchDepth":1578,"depth":1578,"links":3408},[3409,3410,3414,3417,3420,3421,3422],{"id":1527,"depth":1578,"text":1528},{"id":1538,"depth":1578,"text":1539,"children":3411},[3412,3413],{"id":2060,"depth":1598,"text":2061},{"id":2077,"depth":1598,"text":2077},{"id":2339,"depth":1578,"text":2340,"children":3415},[3416],{"id":2707,"depth":1598,"text":2708},{"id":2732,"depth":1578,"text":2733,"children":3418},[3419],{"id":3104,"depth":1598,"text":3105},{"id":3131,"depth":1578,"text":3132},{"id":3159,"depth":1578,"text":3160},{"id":3194,"depth":1578,"text":3195,"children":3423},[3424,3426],{"id":3198,"depth":1598,"text":3425},"练习 1：用 @extend 和 %placeholder 写一个按钮组样式",{"id":3285,"depth":1598,"text":3286},"全面讲解 Scss 中 @extend、%placeholder 的用法，以及结合 BEM 和模块化拆分的实用技巧，助你写出干净高复用的代码。","md",null,{},{"title":431},{"title":431,"description":3427},"SVOJwbkYgv",[3435,3437],{"title":427,"path":428,"stem":429,"description":3436,"children":-1},"通过 Scss 的 Mixin 和函数，掌握样式复用与可配置的秘诀，让你的 CSS 更高效且灵活。",{"title":435,"path":436,"stem":437,"description":3438,"children":-1},"通过 @if、@else 和循环语法，动态生成样式，打造灵活高效的前端样式代码",1784715108687]